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llvm-project/llvm/test/CodeGen/X86/absolute-rotate.ll

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IR, X86: Understand !absolute_symbol metadata on global variables. Summary: Attaching !absolute_symbol to a global variable does two things: 1) Marks it as an absolute symbol reference. 2) Specifies the value range of that symbol's address. Teach the X86 backend to allow absolute symbols to appear in place of immediates by extending the relocImm and mov64imm32 matchers. Start using relocImm in more places where it is legal. As previously proposed on llvm-dev: http://lists.llvm.org/pipermail/llvm-dev/2016-October/105800.html Differential Revision: https://reviews.llvm.org/D25878 llvm-svn: 289087
2016-12-09 03:01:00 +08:00
; RUN: llc < %s | FileCheck %s
; RUN: llc -relocation-model=pic < %s | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@align = external hidden global i8, !absolute_symbol !0
declare void @f()
define void @foo(i64 %val) {
%shr = lshr i64 %val, zext (i8 ptrtoint (i8* @align to i8) to i64)
%shl = shl i64 %val, zext (i8 sub (i8 64, i8 ptrtoint (i8* @align to i8)) to i64)
X86: Produce @ABS8 symbol modifiers for absolute symbols in range [0,128). Differential Revision: https://reviews.llvm.org/D28689 llvm-svn: 293844
2017-02-02 08:32:03 +08:00
; CHECK: rorq $align@ABS8, %rdi
IR, X86: Understand !absolute_symbol metadata on global variables. Summary: Attaching !absolute_symbol to a global variable does two things: 1) Marks it as an absolute symbol reference. 2) Specifies the value range of that symbol's address. Teach the X86 backend to allow absolute symbols to appear in place of immediates by extending the relocImm and mov64imm32 matchers. Start using relocImm in more places where it is legal. As previously proposed on llvm-dev: http://lists.llvm.org/pipermail/llvm-dev/2016-October/105800.html Differential Revision: https://reviews.llvm.org/D25878 llvm-svn: 289087
2016-12-09 03:01:00 +08:00
%ror = or i64 %shr, %shl
%cmp = icmp ult i64 %ror, 109
br i1 %cmp, label %t, label %f
t:
call void @f()
ret void
f:
ret void
}
[X86] Use relocImm in the ROL8ri/ROL16ri/ROL32ri/ROL64ri patterns to be consistent with the ROR patterns. llvm-svn: 356407
2019-03-19 04:43:15 +08:00
define void @bar(i64 %val) {
%shr = shl i64 %val, zext (i8 ptrtoint (i8* @align to i8) to i64)
%shl = lshr i64 %val, zext (i8 sub (i8 64, i8 ptrtoint (i8* @align to i8)) to i64)
; CHECK: rolq $align@ABS8, %rdi
%rol = or i64 %shr, %shl
%cmp = icmp ult i64 %rol, 109
br i1 %cmp, label %t, label %f
t:
call void @f()
ret void
f:
ret void
}
X86: Produce @ABS8 symbol modifiers for absolute symbols in range [0,128). Differential Revision: https://reviews.llvm.org/D28689 llvm-svn: 293844
2017-02-02 08:32:03 +08:00
!0 = !{i64 0, i64 128}