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[AArch64] Change the preferred alignment for char and short to word alignment.

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The commit reinstates r273279, which was informally approved.

Original Review: http://reviews.llvm.org/D21414

This reverts commit ca632c91aaa7cafc50942f890c49f727a046ace1.

llvm-svn: 274790
This commit is contained in:
Chad Rosier 2016-07-07 20:02:18 +00:00
parent e02b97a468
commit c23cef56dc
2 changed files with 30 additions and 2 deletions
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4
lib/Target/AArch64/AArch64TargetMachine.cpp
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@ -133,8 +133,8 @@ static std::string computeDataLayout(const Triple &TT, bool LittleEndian) {
if (TT.isOSBinFormatMachO())
return "e-m:o-i64:64-i128:128-n32:64-S128";
if (LittleEndian)
return "e-m:e-i64:64-i128:128-n32:64-S128";
return "E-m:e-i64:64-i128:128-n32:64-S128";
return "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128";
return "E-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128";
}
// Helper function to set up the defaults for reciprocals.

28
test/CodeGen/AArch64/preferred-alignment.ll Normal file
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@ -0,0 +1,28 @@
; RUN: llc -mtriple=aarch64 -O0 < %s | FileCheck %s
; Function Attrs: nounwind
define i32 @foo() #0 {
entry:
%c = alloca i8, align 1
; CHECK: add x0, sp, #12
%s = alloca i16, align 2
; CHECK-NEXT: add x1, sp, #8
%i = alloca i32, align 4
; CHECK-NEXT: add x2, sp, #4
%call = call i32 @bar(i8* %c, i16* %s, i32* %i)
%0 = load i8, i8* %c, align 1
%conv = zext i8 %0 to i32
%add = add nsw i32 %call, %conv
%1 = load i16, i16* %s, align 2
%conv1 = sext i16 %1 to i32
%add2 = add nsw i32 %add, %conv1
%2 = load i32, i32* %i, align 4
%add3 = add nsw i32 %add2, %2
ret i32 %add3
}
declare i32 @bar(i8*, i16*, i32*) #1
attributes #0 = { nounwind "no-frame-pointer-elim"="false" }
attributes #1 = { "no-frame-pointer-elim"="false" }