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llvm-project/llvm/test/CodeGen/AArch64/fast-isel-address-extends.ll

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Revert "[AArch64][FastISel] Add more truncation tests." and "[AArch64][FastISel] Always use an AND instruction when truncating to non-legal types." This reverts commit r243198 and 243304. Turns out this wasn't the correct fix for this problem. It works only within FastISel, but fails when the truncate is selected by SDAG. llvm-svn: 244287
2015-08-07 06:13:48 +08:00
; RUN: llc %s -o - -O0 -verify-machineinstrs -fast-isel=true | FileCheck %s
[AArch64] Fix sext/zext folding in address arithmetic. We were accidentally folding a sign/zero extend in to address arithmetic in a different BB when the extend wasn't available there. Cross BB fast-isel isn't safe, so restrict this to only when the extend is in the same BB as the use. llvm-svn: 236764
2015-05-08 03:21:36 +08:00
target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
target triple = "arm64-apple-ios8.0.0"
; This test was trying to fold the sext %tmp142 in to the address arithmetic in %sunkaddr1.
; This was incorrect as %.mux isn't available in the last bb.
; CHECK: sxtw [[REG:x[0-9]+]]
Revert "[AArch64][FastISel] Add more truncation tests." and "[AArch64][FastISel] Always use an AND instruction when truncating to non-legal types." This reverts commit r243198 and 243304. Turns out this wasn't the correct fix for this problem. It works only within FastISel, but fails when the truncate is selected by SDAG. llvm-svn: 244287
2015-08-07 06:13:48 +08:00
; CHECK: strh wzr, {{\[}}[[REG]], {{.*}}, lsl #1]
[AArch64] Fix sext/zext folding in address arithmetic. We were accidentally folding a sign/zero extend in to address arithmetic in a different BB when the extend wasn't available there. Cross BB fast-isel isn't safe, so restrict this to only when the extend is in the same BB as the use. llvm-svn: 236764
2015-05-08 03:21:36 +08:00
; Function Attrs: nounwind optsize ssp
define void @EdgeLoop(i32 %dir, i32 %edge, i32 %width, i16* %tmp89, i32 %tmp136, i16 %tmp144) #0 {
bb:
%tmp2 = icmp eq i32 %dir, 0
%.mux = select i1 %tmp2, i32 %width, i32 1
%tmp142 = sext i32 %.mux to i64
%tmp151 = shl nsw i64 %tmp142, 1
%tmp153 = getelementptr inbounds i16, i16* %tmp89, i64 %tmp151
%tmp154 = load i16, i16* %tmp153, align 2
%tmp155 = zext i16 %tmp154 to i32
br i1 %tmp2, label %bb225, label %bb212
bb212: ; preds = %bb
store i16 %tmp144, i16* %tmp89, align 2
ret void
bb225: ; preds = %bb
%tmp248 = trunc i32 %tmp155 to i16
store i16 %tmp248, i16* %tmp89, align 2
%sunkaddr = ptrtoint i16* %tmp89 to i64
%sunkaddr1 = mul i64 %tmp142, 2
%sunkaddr2 = add i64 %sunkaddr, %sunkaddr1
%sunkaddr3 = inttoptr i64 %sunkaddr2 to i16*
store i16 0, i16* %sunkaddr3, align 2
ret void
}
attributes #0 = { nounwind optsize ssp }