forked from OSchip/llvm-project
535 lines
22 KiB
LLVM
535 lines
22 KiB
LLVM
; RUN: opt -S -codegenprepare %s -o - | FileCheck %s
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; RUN: opt -S -codegenprepare -addr-sink-using-gep=1 %s -o - | FileCheck -check-prefix=CHECK-GEP %s
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; This file tests the different cases what are involved when codegen prepare
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; tries to get sign/zero extension out of the way of addressing mode.
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; This tests require an actual target as addressing mode decisions depends
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; on the target.
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target datalayout = "e-i64:64-f80:128-s:64-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx"
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; Check that we correctly promote both operands of the promotable add.
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; CHECK-LABEL: @twoArgsPromotion
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; CHECK: [[ARG1SEXT:%[a-zA-Z_0-9-]+]] = sext i32 %arg1 to i64
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; CHECK: [[ARG2SEXT:%[a-zA-Z_0-9-]+]] = sext i32 %arg2 to i64
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; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nsw i64 [[ARG1SEXT]], [[ARG2SEXT]]
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; CHECK: inttoptr i64 [[PROMOTED]] to i8*
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; CHECK: ret
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define i8 @twoArgsPromotion(i32 %arg1, i32 %arg2) {
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%add = add nsw i32 %arg1, %arg2
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%sextadd = sext i32 %add to i64
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%base = inttoptr i64 %sextadd to i8*
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%res = load i8* %base
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ret i8 %res
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}
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; Check that we do not promote both operands of the promotable add when
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; the instruction will not be folded into the addressing mode.
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; Otherwise, we will increase the number of instruction executed.
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; (This is a heuristic of course, because the new sext could have been
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; merged with something else.)
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; CHECK-LABEL: @twoArgsNoPromotion
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; CHECK: add nsw i32 %arg1, %arg2
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; CHECK: ret
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define i8 @twoArgsNoPromotion(i32 %arg1, i32 %arg2, i8* %base) {
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%add = add nsw i32 %arg1, %arg2
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%sextadd = sext i32 %add to i64
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%arrayidx = getelementptr inbounds i8* %base, i64 %sextadd
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%res = load i8* %arrayidx
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ret i8 %res
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}
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; Check that we do not promote when the related instruction does not have
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; the nsw flag.
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; CHECK-LABEL: @noPromotion
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; CHECK-NOT: add i64
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; CHECK: ret
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define i8 @noPromotion(i32 %arg1, i32 %arg2, i8* %base) {
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%add = add i32 %arg1, %arg2
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%sextadd = sext i32 %add to i64
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%arrayidx = getelementptr inbounds i8* %base, i64 %sextadd
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%res = load i8* %arrayidx
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ret i8 %res
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}
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; Check that we correctly promote constant arguments.
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; CHECK-LABEL: @oneArgPromotion
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; CHECK: [[ARG1SEXT:%[a-zA-Z_0-9-]+]] = sext i32 %arg1 to i64
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; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nsw i64 [[ARG1SEXT]], 1
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; CHECK: getelementptr inbounds i8* %base, i64 [[PROMOTED]]
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; CHECK: ret
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define i8 @oneArgPromotion(i32 %arg1, i8* %base) {
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%add = add nsw i32 %arg1, 1
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%sextadd = sext i32 %add to i64
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%arrayidx = getelementptr inbounds i8* %base, i64 %sextadd
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%res = load i8* %arrayidx
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ret i8 %res
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}
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; Check that we are able to merge a sign extension with a zero extension.
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; CHECK-LABEL: @oneArgPromotionZExt
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; CHECK: [[ARG1ZEXT:%[a-zA-Z_0-9-]+]] = zext i8 %arg1 to i64
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; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nsw i64 [[ARG1ZEXT]], 1
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; CHECK: getelementptr inbounds i8* %base, i64 [[PROMOTED]]
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; CHECK: ret
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define i8 @oneArgPromotionZExt(i8 %arg1, i8* %base) {
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%zext = zext i8 %arg1 to i32
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%add = add nsw i32 %zext, 1
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%sextadd = sext i32 %add to i64
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%arrayidx = getelementptr inbounds i8* %base, i64 %sextadd
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%res = load i8* %arrayidx
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ret i8 %res
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}
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; When promoting a constant zext, the IR builder returns a constant,
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; not an instruction. Make sure this is properly handled. This used
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; to crash.
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; Note: The constant zext is promoted, but does not help matching
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; more thing in the addressing mode. Therefore the modification is
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; rolled back.
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; Still, this test case exercises the desired code path.
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; CHECK-LABEL: @oneArgPromotionCstZExt
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; CHECK: [[ZEXT:%[a-zA-Z_0-9-]+]] = zext i16 undef to i32
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; CHECK: [[SEXT:%[a-zA-Z_0-9-]+]] = sext i32 [[ZEXT]] to i64
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; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nsw i64 [[SEXT]], 1
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; CHECK: getelementptr inbounds i8* %base, i64 [[PROMOTED]]
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; CHECK: ret
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define i8 @oneArgPromotionCstZExt(i8* %base) {
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%cst = zext i16 undef to i32
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%add = add nsw i32 %cst, 1
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%sextadd = sext i32 %add to i64
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%arrayidx = getelementptr inbounds i8* %base, i64 %sextadd
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%res = load i8* %arrayidx
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ret i8 %res
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}
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; Check that we do not promote truncate when we cannot determine the
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; bits that are dropped.
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; CHECK-LABEL: @oneArgPromotionBlockTrunc1
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; CHECK: [[ARG1TRUNC:%[a-zA-Z_0-9-]+]] = trunc i32 %arg1 to i8
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; CHECK: [[ARG1SEXT:%[a-zA-Z_0-9-]+]] = sext i8 [[ARG1TRUNC]] to i64
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; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nsw i64 [[ARG1SEXT]], 1
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; CHECK: getelementptr inbounds i8* %base, i64 [[PROMOTED]]
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; CHECK: ret
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define i8 @oneArgPromotionBlockTrunc1(i32 %arg1, i8* %base) {
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%trunc = trunc i32 %arg1 to i8
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%add = add nsw i8 %trunc, 1
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%sextadd = sext i8 %add to i64
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%arrayidx = getelementptr inbounds i8* %base, i64 %sextadd
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%res = load i8* %arrayidx
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ret i8 %res
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}
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; Check that we do not promote truncate when we cannot determine all the
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; bits that are dropped.
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; CHECK-LABEL: @oneArgPromotionBlockTrunc2
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; CHECK: [[ARG1SEXT:%[a-zA-Z_0-9-]+]] = sext i16 %arg1 to i32
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; CHECK: [[ARG1TRUNC:%[a-zA-Z_0-9-]+]] = trunc i32 [[ARG1SEXT]] to i8
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; CHECK: [[ARG1SEXT64:%[a-zA-Z_0-9-]+]] = sext i8 [[ARG1TRUNC]] to i64
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; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nsw i64 [[ARG1SEXT64]], 1
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; CHECK: getelementptr inbounds i8* %base, i64 [[PROMOTED]]
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; CHECK: ret
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define i8 @oneArgPromotionBlockTrunc2(i16 %arg1, i8* %base) {
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%sextarg1 = sext i16 %arg1 to i32
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%trunc = trunc i32 %sextarg1 to i8
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%add = add nsw i8 %trunc, 1
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%sextadd = sext i8 %add to i64
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%arrayidx = getelementptr inbounds i8* %base, i64 %sextadd
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%res = load i8* %arrayidx
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ret i8 %res
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}
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; Check that we are able to promote truncate when we know all the bits
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; that are dropped.
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; CHECK-LABEL: @oneArgPromotionPassTruncKeepSExt
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; CHECK: [[ARG1SEXT:%[a-zA-Z_0-9-]+]] = sext i1 %arg1 to i64
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; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nsw i64 [[ARG1SEXT]], 1
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; CHECK: getelementptr inbounds i8* %base, i64 [[PROMOTED]]
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; CHECK: ret
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define i8 @oneArgPromotionPassTruncKeepSExt(i1 %arg1, i8* %base) {
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%sextarg1 = sext i1 %arg1 to i32
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%trunc = trunc i32 %sextarg1 to i8
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%add = add nsw i8 %trunc, 1
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%sextadd = sext i8 %add to i64
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%arrayidx = getelementptr inbounds i8* %base, i64 %sextadd
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%res = load i8* %arrayidx
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ret i8 %res
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}
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; On X86 truncate are free. Check that we are able to promote the add
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; to be used as addressing mode and that we insert a truncate for the other
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; use.
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; CHECK-LABEL: @oneArgPromotionTruncInsert
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; CHECK: [[ARG1SEXT:%[a-zA-Z_0-9-]+]] = sext i8 %arg1 to i64
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; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nsw i64 [[ARG1SEXT]], 1
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; CHECK: [[TRUNC:%[a-zA-Z_0-9-]+]] = trunc i64 [[PROMOTED]] to i8
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; CHECK: [[GEP:%[a-zA-Z_0-9-]+]] = getelementptr inbounds i8* %base, i64 [[PROMOTED]]
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; CHECK: [[LOAD:%[a-zA-Z_0-9-]+]] = load i8* [[GEP]]
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; CHECK: add i8 [[LOAD]], [[TRUNC]]
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; CHECK: ret
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define i8 @oneArgPromotionTruncInsert(i8 %arg1, i8* %base) {
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%add = add nsw i8 %arg1, 1
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%sextadd = sext i8 %add to i64
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%arrayidx = getelementptr inbounds i8* %base, i64 %sextadd
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%res = load i8* %arrayidx
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%finalres = add i8 %res, %add
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ret i8 %finalres
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}
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; Cannot sext from a larger type than the promoted type.
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; CHECK-LABEL: @oneArgPromotionLargerType
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; CHECK: [[ARG1TRUNC:%[a-zA-Z_0-9-]+]] = trunc i128 %arg1 to i8
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; CHECK: [[ARG1SEXT64:%[a-zA-Z_0-9-]+]] = sext i8 [[ARG1TRUNC]] to i64
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; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nsw i64 [[ARG1SEXT64]], 1
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; CHECK: getelementptr inbounds i8* %base, i64 [[PROMOTED]]
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; CHECK: ret
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define i8 @oneArgPromotionLargerType(i128 %arg1, i8* %base) {
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%trunc = trunc i128 %arg1 to i8
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%add = add nsw i8 %trunc, 1
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%sextadd = sext i8 %add to i64
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%arrayidx = getelementptr inbounds i8* %base, i64 %sextadd
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%res = load i8* %arrayidx
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%finalres = add i8 %res, %add
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ret i8 %finalres
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}
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; Use same inserted trunc
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; On X86 truncate are free. Check that we are able to promote the add
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; to be used as addressing mode and that we insert a truncate for
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; *all* the other uses.
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; CHECK-LABEL: @oneArgPromotionTruncInsertSeveralUse
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; CHECK: [[ARG1SEXT:%[a-zA-Z_0-9-]+]] = sext i8 %arg1 to i64
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; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nsw i64 [[ARG1SEXT]], 1
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; CHECK: [[TRUNC:%[a-zA-Z_0-9-]+]] = trunc i64 [[PROMOTED]] to i8
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; CHECK: [[GEP:%[a-zA-Z_0-9-]+]] = getelementptr inbounds i8* %base, i64 [[PROMOTED]]
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; CHECK: [[LOAD:%[a-zA-Z_0-9-]+]] = load i8* [[GEP]]
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; CHECK: [[ADDRES:%[a-zA-Z_0-9-]+]] = add i8 [[LOAD]], [[TRUNC]]
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; CHECK: add i8 [[ADDRES]], [[TRUNC]]
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; CHECK: ret
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define i8 @oneArgPromotionTruncInsertSeveralUse(i8 %arg1, i8* %base) {
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%add = add nsw i8 %arg1, 1
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%sextadd = sext i8 %add to i64
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%arrayidx = getelementptr inbounds i8* %base, i64 %sextadd
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%res = load i8* %arrayidx
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%almostfinalres = add i8 %res, %add
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%finalres = add i8 %almostfinalres, %add
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ret i8 %finalres
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}
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; Check that the promoted instruction is used for all uses of the original
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; sign extension.
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; CHECK-LABEL: @oneArgPromotionSExtSeveralUse
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; CHECK: [[ARG1SEXT:%[a-zA-Z_0-9-]+]] = sext i8 %arg1 to i64
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; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nsw i64 [[ARG1SEXT]], 1
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; CHECK: [[GEP:%[a-zA-Z_0-9-]+]] = getelementptr inbounds i8* %base, i64 [[PROMOTED]]
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; CHECK: [[LOAD:%[a-zA-Z_0-9-]+]] = load i8* [[GEP]]
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; CHECK: [[ADDRES:%[a-zA-Z_0-9-]+]] = zext i8 [[LOAD]] to i64
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; CHECK: add i64 [[ADDRES]], [[PROMOTED]]
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; CHECK: ret
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define i64 @oneArgPromotionSExtSeveralUse(i8 %arg1, i8* %base) {
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%add = add nsw i8 %arg1, 1
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%sextadd = sext i8 %add to i64
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%arrayidx = getelementptr inbounds i8* %base, i64 %sextadd
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%res = load i8* %arrayidx
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%almostfinalres = zext i8 %res to i64
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%finalres = add i64 %almostfinalres, %sextadd
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ret i64 %finalres
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}
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; Check all types of rollback mechanism.
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; For this test, the sign extension stays in place.
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; However, the matching process goes until promoting both the operands
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; of the first promotable add implies.
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; At this point the rollback mechanism kicks in and restores the states
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; until the addressing mode matcher is able to match something: in that
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; case promote nothing.
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; Along the way, the promotion mechanism involves:
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; - Mutating the type of %promotableadd1 and %promotableadd2.
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; - Creating a sext for %arg1 and %arg2.
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; - Creating a trunc for a use of %promotableadd1.
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; - Replacing a bunch of uses.
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; - Setting the operands of the promoted instruction with the promoted values.
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; - Moving instruction around (mainly sext when promoting instruction).
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; Each type of those promotions has to be undo at least once during this
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; specific test.
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; CHECK-LABEL: @twoArgsPromotionNest
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; CHECK: [[ORIG:%[a-zA-Z_0-9-]+]] = add nsw i32 %arg1, %arg2
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; CHECK: [[ADD:%[a-zA-Z_0-9-]+]] = add nsw i32 [[ORIG]], [[ORIG]]
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; CHECK: [[SEXT:%[a-zA-Z_0-9-]+]] = sext i32 [[ADD]] to i64
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; CHECK: getelementptr inbounds i8* %base, i64 [[SEXT]]
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; CHECK: ret
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define i8 @twoArgsPromotionNest(i32 %arg1, i32 %arg2, i8* %base) {
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%promotableadd1 = add nsw i32 %arg1, %arg2
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%promotableadd2 = add nsw i32 %promotableadd1, %promotableadd1
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%sextadd = sext i32 %promotableadd2 to i64
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%arrayidx = getelementptr inbounds i8* %base, i64 %sextadd
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%res = load i8* %arrayidx
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ret i8 %res
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}
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; Test the InstructionRemover undo, which was the only one not
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; kicked in the previous test.
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; The matcher first promotes the add, removes the trunc and promotes
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; the sext of arg1.
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; Then, the matcher cannot use an addressing mode r + r + r, thus it
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; rolls back.
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; CHECK-LABEL: @twoArgsNoPromotionRemove
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; CHECK: [[SEXTARG1:%[a-zA-Z_0-9-]+]] = sext i1 %arg1 to i32
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; CHECK: [[TRUNC:%[a-zA-Z_0-9-]+]] = trunc i32 [[SEXTARG1]] to i8
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; CHECK: [[ADD:%[a-zA-Z_0-9-]+]] = add nsw i8 [[TRUNC]], %arg2
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; CHECK: [[SEXT:%[a-zA-Z_0-9-]+]] = sext i8 [[ADD]] to i64
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; CHECK: getelementptr inbounds i8* %base, i64 [[SEXT]]
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; CHECK: ret
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define i8 @twoArgsNoPromotionRemove(i1 %arg1, i8 %arg2, i8* %base) {
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%sextarg1 = sext i1 %arg1 to i32
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%trunc = trunc i32 %sextarg1 to i8
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%add = add nsw i8 %trunc, %arg2
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%sextadd = sext i8 %add to i64
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%arrayidx = getelementptr inbounds i8* %base, i64 %sextadd
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%res = load i8* %arrayidx
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ret i8 %res
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}
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; Ensure that when the profitability checks kicks in, the IR is not modified
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; will IgnoreProfitability is on.
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; The profitabily check happens when a candidate instruction has several uses.
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; The matcher will create a new matcher for each use and check if the
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; instruction is in the list of the matched instructions of this new matcher.
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; All changes made by the new matchers must be dropped before pursuing
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; otherwise the state of the original matcher will be wrong.
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;
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; Without the profitability check, when checking for the second use of
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; arrayidx, the matcher promotes everything all the way to %arg1, %arg2.
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; Check that we did not promote anything in the final matching.
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;
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; <rdar://problem/16020230>
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; CHECK-LABEL: @checkProfitability
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; CHECK-NOT: {{%[a-zA-Z_0-9-]+}} = sext i32 %arg1 to i64
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; CHECK-NOT: {{%[a-zA-Z_0-9-]+}} = sext i32 %arg2 to i64
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; CHECK: [[SHL:%[a-zA-Z_0-9-]+]] = shl nsw i32 %arg1, 1
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; CHECK: [[ADD:%[a-zA-Z_0-9-]+]] = add nsw i32 [[SHL]], %arg2
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; CHECK: [[SEXTADD:%[a-zA-Z_0-9-]+]] = sext i32 [[ADD]] to i64
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; BB then
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; CHECK: [[BASE1:%[a-zA-Z_0-9-]+]] = add i64 [[SEXTADD]], 48
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; CHECK: [[ADDR1:%[a-zA-Z_0-9-]+]] = inttoptr i64 [[BASE1]] to i32*
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; CHECK: load i32* [[ADDR1]]
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; BB else
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; CHECK: [[BASE2:%[a-zA-Z_0-9-]+]] = add i64 [[SEXTADD]], 48
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; CHECK: [[ADDR2:%[a-zA-Z_0-9-]+]] = inttoptr i64 [[BASE2]] to i32*
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; CHECK: load i32* [[ADDR2]]
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; CHECK: ret
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; CHECK-GEP-LABEL: @checkProfitability
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; CHECK-GEP-NOT: {{%[a-zA-Z_0-9-]+}} = sext i32 %arg1 to i64
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; CHECK-GEP-NOT: {{%[a-zA-Z_0-9-]+}} = sext i32 %arg2 to i64
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; CHECK-GEP: [[SHL:%[a-zA-Z_0-9-]+]] = shl nsw i32 %arg1, 1
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; CHECK-GEP: [[ADD:%[a-zA-Z_0-9-]+]] = add nsw i32 [[SHL]], %arg2
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; CHECK-GEP: [[SEXTADD:%[a-zA-Z_0-9-]+]] = sext i32 [[ADD]] to i64
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; BB then
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; CHECK-GEP: [[BASE1:%[a-zA-Z_0-9-]+]] = inttoptr i64 [[SEXTADD]] to i32*
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; CHECK-GEP: [[BCC1:%[a-zA-Z_0-9-]+]] = bitcast i32* [[BASE1]] to i8*
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; CHECK-GEP: [[FULL1:%[a-zA-Z_0-9-]+]] = getelementptr i8* [[BCC1]], i64 48
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; CHECK-GEP: [[ADDR1:%[a-zA-Z_0-9-]+]] = bitcast i8* [[FULL1]] to i32*
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; CHECK-GEP: load i32* [[ADDR1]]
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; BB else
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; CHECK-GEP: [[BASE2:%[a-zA-Z_0-9-]+]] = inttoptr i64 [[SEXTADD]] to i32*
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; CHECK-GEP: [[BCC2:%[a-zA-Z_0-9-]+]] = bitcast i32* [[BASE2]] to i8*
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; CHECK-GEP: [[FULL2:%[a-zA-Z_0-9-]+]] = getelementptr i8* [[BCC2]], i64 48
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; CHECK-GEP: [[ADDR2:%[a-zA-Z_0-9-]+]] = bitcast i8* [[FULL2]] to i32*
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; CHECK-GEP: load i32* [[ADDR2]]
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; CHECK-GEP: ret
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define i32 @checkProfitability(i32 %arg1, i32 %arg2, i1 %test) {
|
|
%shl = shl nsw i32 %arg1, 1
|
|
%add1 = add nsw i32 %shl, %arg2
|
|
%sextidx1 = sext i32 %add1 to i64
|
|
%tmpptr = inttoptr i64 %sextidx1 to i32*
|
|
%arrayidx1 = getelementptr i32* %tmpptr, i64 12
|
|
br i1 %test, label %then, label %else
|
|
then:
|
|
%res1 = load i32* %arrayidx1
|
|
br label %end
|
|
else:
|
|
%res2 = load i32* %arrayidx1
|
|
br label %end
|
|
end:
|
|
%tmp = phi i32 [%res1, %then], [%res2, %else]
|
|
%res = add i32 %tmp, %add1
|
|
%addr = inttoptr i32 %res to i32*
|
|
%final = load i32* %addr
|
|
ret i32 %final
|
|
}
|
|
|
|
%struct.dns_packet = type { i32, i32, %union.anon }
|
|
%union.anon = type { i32 }
|
|
|
|
@a = common global i32 0, align 4
|
|
@b = common global i16 0, align 2
|
|
|
|
; We used to crash on this function because we did not return the right
|
|
; promoted instruction for %conv.i.
|
|
; Make sure we generate the right code now.
|
|
; CHECK-LABEL: @fn3
|
|
; %conv.i is used twice and only one of its use is being promoted.
|
|
; Use it at the starting point for the matching.
|
|
; CHECK: %conv.i = zext i16 [[PLAIN_OPND:%[.a-zA-Z_0-9-]+]] to i32
|
|
; CHECK-NEXT: [[PROMOTED_CONV:%[.a-zA-Z_0-9-]+]] = zext i16 [[PLAIN_OPND]] to i64
|
|
; CHECK-NEXT: [[BASE:%[a-zA-Z_0-9-]+]] = ptrtoint %struct.dns_packet* %P to i64
|
|
; CHECK-NEXT: [[ADD:%[a-zA-Z_0-9-]+]] = add i64 [[BASE]], [[PROMOTED_CONV]]
|
|
; CHECK-NEXT: [[ADDR:%[a-zA-Z_0-9-]+]] = add i64 [[ADD]], 7
|
|
; CHECK-NEXT: [[CAST:%[a-zA-Z_0-9-]+]] = inttoptr i64 [[ADDR]] to i8*
|
|
; CHECK-NEXT: load i8* [[CAST]], align 1
|
|
define signext i16 @fn3(%struct.dns_packet* nocapture readonly %P) {
|
|
entry:
|
|
%tmp = getelementptr inbounds %struct.dns_packet* %P, i64 0, i32 2
|
|
%data.i.i = bitcast %union.anon* %tmp to [0 x i8]*
|
|
br label %while.body.i.i
|
|
|
|
while.body.i.i: ; preds = %while.body.i.i, %entry
|
|
%src.addr.0.i.i = phi i16 [ 0, %entry ], [ %inc.i.i, %while.body.i.i ]
|
|
%inc.i.i = add i16 %src.addr.0.i.i, 1
|
|
%idxprom.i.i = sext i16 %src.addr.0.i.i to i64
|
|
%arrayidx.i.i = getelementptr inbounds [0 x i8]* %data.i.i, i64 0, i64 %idxprom.i.i
|
|
%tmp1 = load i8* %arrayidx.i.i, align 1
|
|
%conv2.i.i = zext i8 %tmp1 to i32
|
|
%and.i.i = and i32 %conv2.i.i, 15
|
|
store i32 %and.i.i, i32* @a, align 4
|
|
%tobool.i.i = icmp eq i32 %and.i.i, 0
|
|
br i1 %tobool.i.i, label %while.body.i.i, label %fn1.exit.i
|
|
|
|
fn1.exit.i: ; preds = %while.body.i.i
|
|
%inc.i.i.lcssa = phi i16 [ %inc.i.i, %while.body.i.i ]
|
|
%conv.i = zext i16 %inc.i.i.lcssa to i32
|
|
%sub.i = add nsw i32 %conv.i, -1
|
|
%idxprom.i = sext i32 %sub.i to i64
|
|
%arrayidx.i = getelementptr inbounds [0 x i8]* %data.i.i, i64 0, i64 %idxprom.i
|
|
%tmp2 = load i8* %arrayidx.i, align 1
|
|
%conv2.i = sext i8 %tmp2 to i16
|
|
store i16 %conv2.i, i16* @b, align 2
|
|
%sub4.i = sub nsw i32 0, %conv.i
|
|
%conv5.i = zext i16 %conv2.i to i32
|
|
%cmp.i = icmp sgt i32 %conv5.i, %sub4.i
|
|
br i1 %cmp.i, label %if.then.i, label %fn2.exit
|
|
|
|
if.then.i: ; preds = %fn1.exit.i
|
|
%end.i = getelementptr inbounds %struct.dns_packet* %P, i64 0, i32 1
|
|
%tmp3 = load i32* %end.i, align 4
|
|
%sub7.i = add i32 %tmp3, 65535
|
|
%conv8.i = trunc i32 %sub7.i to i16
|
|
br label %fn2.exit
|
|
|
|
fn2.exit: ; preds = %if.then.i, %fn1.exit.i
|
|
%retval.0.i = phi i16 [ %conv8.i, %if.then.i ], [ undef, %fn1.exit.i ]
|
|
ret i16 %retval.0.i
|
|
}
|
|
|
|
; Check that we do not promote an extension if the non-wrapping flag does not
|
|
; match the kind of the extension.
|
|
; CHECK-LABEL: @noPromotionFlag
|
|
; CHECK: [[ADD:%[a-zA-Z_0-9-]+]] = add nsw i32 %arg1, %arg2
|
|
; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = zext i32 [[ADD]] to i64
|
|
; CHECK: inttoptr i64 [[PROMOTED]] to i8*
|
|
; CHECK: ret
|
|
define i8 @noPromotionFlag(i32 %arg1, i32 %arg2) {
|
|
%add = add nsw i32 %arg1, %arg2
|
|
%zextadd = zext i32 %add to i64
|
|
%base = inttoptr i64 %zextadd to i8*
|
|
%res = load i8* %base
|
|
ret i8 %res
|
|
}
|
|
|
|
; Check that we correctly promote both operands of the promotable add with zext.
|
|
; CHECK-LABEL: @twoArgsPromotionZExt
|
|
; CHECK: [[ARG1ZEXT:%[a-zA-Z_0-9-]+]] = zext i32 %arg1 to i64
|
|
; CHECK: [[ARG2ZEXT:%[a-zA-Z_0-9-]+]] = zext i32 %arg2 to i64
|
|
; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nuw i64 [[ARG1ZEXT]], [[ARG2ZEXT]]
|
|
; CHECK: inttoptr i64 [[PROMOTED]] to i8*
|
|
; CHECK: ret
|
|
define i8 @twoArgsPromotionZExt(i32 %arg1, i32 %arg2) {
|
|
%add = add nuw i32 %arg1, %arg2
|
|
%zextadd = zext i32 %add to i64
|
|
%base = inttoptr i64 %zextadd to i8*
|
|
%res = load i8* %base
|
|
ret i8 %res
|
|
}
|
|
|
|
; Check that we correctly promote constant arguments.
|
|
; CHECK-LABEL: @oneArgPromotionNegativeCstZExt
|
|
; CHECK: [[ARG1ZEXT:%[a-zA-Z_0-9-]+]] = zext i8 %arg1 to i64
|
|
; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nuw i64 [[ARG1ZEXT]], 255
|
|
; CHECK: getelementptr inbounds i8* %base, i64 [[PROMOTED]]
|
|
; CHECK: ret
|
|
define i8 @oneArgPromotionNegativeCstZExt(i8 %arg1, i8* %base) {
|
|
%add = add nuw i8 %arg1, -1
|
|
%zextadd = zext i8 %add to i64
|
|
%arrayidx = getelementptr inbounds i8* %base, i64 %zextadd
|
|
%res = load i8* %arrayidx
|
|
ret i8 %res
|
|
}
|
|
|
|
; Check that we are able to merge two zero extensions.
|
|
; CHECK-LABEL: @oneArgPromotionZExtZExt
|
|
; CHECK: [[ARG1ZEXT:%[a-zA-Z_0-9-]+]] = zext i8 %arg1 to i64
|
|
; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nuw i64 [[ARG1ZEXT]], 1
|
|
; CHECK: getelementptr inbounds i8* %base, i64 [[PROMOTED]]
|
|
; CHECK: ret
|
|
define i8 @oneArgPromotionZExtZExt(i8 %arg1, i8* %base) {
|
|
%zext = zext i8 %arg1 to i32
|
|
%add = add nuw i32 %zext, 1
|
|
%zextadd = zext i32 %add to i64
|
|
%arrayidx = getelementptr inbounds i8* %base, i64 %zextadd
|
|
%res = load i8* %arrayidx
|
|
ret i8 %res
|
|
}
|
|
|
|
; Check that we do not promote truncate when the dropped bits
|
|
; are of a different kind.
|
|
; CHECK-LABEL: @oneArgPromotionBlockTruncZExt
|
|
; CHECK: [[ARG1SEXT:%[a-zA-Z_0-9-]+]] = sext i1 %arg1 to i32
|
|
; CHECK: [[ARG1TRUNC:%[a-zA-Z_0-9-]+]] = trunc i32 [[ARG1SEXT]] to i8
|
|
; CHECK: [[ARG1ZEXT:%[a-zA-Z_0-9-]+]] = zext i8 [[ARG1TRUNC]] to i64
|
|
; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nuw i64 [[ARG1ZEXT]], 1
|
|
; CHECK: getelementptr inbounds i8* %base, i64 [[PROMOTED]]
|
|
; CHECK: ret
|
|
define i8 @oneArgPromotionBlockTruncZExt(i1 %arg1, i8* %base) {
|
|
%sextarg1 = sext i1 %arg1 to i32
|
|
%trunc = trunc i32 %sextarg1 to i8
|
|
%add = add nuw i8 %trunc, 1
|
|
%zextadd = zext i8 %add to i64
|
|
%arrayidx = getelementptr inbounds i8* %base, i64 %zextadd
|
|
%res = load i8* %arrayidx
|
|
ret i8 %res
|
|
}
|
|
|
|
; Check that we are able to promote truncate when we know all the bits
|
|
; that are dropped.
|
|
; CHECK-LABEL: @oneArgPromotionPassTruncZExt
|
|
; CHECK: [[ARG1ZEXT:%[a-zA-Z_0-9-]+]] = zext i1 %arg1 to i64
|
|
; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nuw i64 [[ARG1ZEXT]], 1
|
|
; CHECK: getelementptr inbounds i8* %base, i64 [[PROMOTED]]
|
|
; CHECK: ret
|
|
define i8 @oneArgPromotionPassTruncZExt(i1 %arg1, i8* %base) {
|
|
%sextarg1 = zext i1 %arg1 to i32
|
|
%trunc = trunc i32 %sextarg1 to i8
|
|
%add = add nuw i8 %trunc, 1
|
|
%zextadd = zext i8 %add to i64
|
|
%arrayidx = getelementptr inbounds i8* %base, i64 %zextadd
|
|
%res = load i8* %arrayidx
|
|
ret i8 %res
|
|
}
|
|
|
|
; Check that we do not promote sext with zext.
|
|
; CHECK-LABEL: @oneArgPromotionBlockSExtZExt
|
|
; CHECK: [[ARG1SEXT:%[a-zA-Z_0-9-]+]] = sext i1 %arg1 to i8
|
|
; CHECK: [[ARG1ZEXT:%[a-zA-Z_0-9-]+]] = zext i8 [[ARG1SEXT]] to i64
|
|
; CHECK: [[PROMOTED:%[a-zA-Z_0-9-]+]] = add nuw i64 [[ARG1ZEXT]], 1
|
|
; CHECK: getelementptr inbounds i8* %base, i64 [[PROMOTED]]
|
|
; CHECK: ret
|
|
define i8 @oneArgPromotionBlockSExtZExt(i1 %arg1, i8* %base) {
|
|
%sextarg1 = sext i1 %arg1 to i8
|
|
%add = add nuw i8 %sextarg1, 1
|
|
%zextadd = zext i8 %add to i64
|
|
%arrayidx = getelementptr inbounds i8* %base, i64 %zextadd
|
|
%res = load i8* %arrayidx
|
|
ret i8 %res
|
|
}
|