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a71c14303e
realignment should be forced. With this commit, we can now force stack realignment when doing LTO and do so on a per-function basis. Also, add a new cl::opt option "stackrealign" to CommandFlags.h which is used to force stack realignment via llc's command line. Out-of-tree projects currently using -force-align-stack to force stack realignment should make changes to attach the attribute to the functions in the IR. Differential Revision: http://reviews.llvm.org/D11814 llvm-svn: 247450
50 lines
2.1 KiB
LLVM
50 lines
2.1 KiB
LLVM
; RUN: llc -mtriple=i386-unknown-freebsd -mcpu=core2 -stack-alignment=4 -relocation-model=pic < %s | FileCheck %s -check-prefix=UNALIGNED
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; RUN: llc -mtriple=i386-unknown-freebsd -mcpu=core2 -stack-alignment=16 -relocation-model=pic < %s | FileCheck %s -check-prefix=ALIGNED
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; RUN: llc -mtriple=i386-unknown-freebsd -mcpu=core2 -stack-alignment=4 -stackrealign -relocation-model=pic < %s | FileCheck %s -check-prefix=FORCEALIGNED
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@arr = internal unnamed_addr global [32 x i32] zeroinitializer, align 16
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; PR12250
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define i32 @test1() {
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vector.ph:
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br label %vector.body
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vector.body:
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%index = phi i32 [ 0, %vector.ph ], [ %index.next, %vector.body ]
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%0 = getelementptr inbounds [32 x i32], [32 x i32]* @arr, i32 0, i32 %index
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%1 = bitcast i32* %0 to <4 x i32>*
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%wide.load = load <4 x i32>, <4 x i32>* %1, align 16
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%2 = add nsw <4 x i32> %wide.load, <i32 10, i32 10, i32 10, i32 10>
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%3 = xor <4 x i32> %2, <i32 123345, i32 123345, i32 123345, i32 123345>
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%4 = add nsw <4 x i32> %3, <i32 112, i32 112, i32 112, i32 112>
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%5 = xor <4 x i32> %4, <i32 543345, i32 543345, i32 543345, i32 543345>
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%6 = add nsw <4 x i32> %5, <i32 73, i32 73, i32 73, i32 73>
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%7 = xor <4 x i32> %6, <i32 345987, i32 345987, i32 345987, i32 345987>
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%8 = add nsw <4 x i32> %7, <i32 48, i32 48, i32 48, i32 48>
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%9 = xor <4 x i32> %8, <i32 123987, i32 123987, i32 123987, i32 123987>
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store <4 x i32> %9, <4 x i32>* %1, align 16
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%index.next = add i32 %index, 4
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%10 = icmp eq i32 %index.next, 32
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br i1 %10, label %middle.block, label %vector.body
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middle.block:
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ret i32 0
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; We can't fold the spill into a padd unless the stack is aligned. Just spilling
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; doesn't force stack realignment though
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; UNALIGNED-LABEL: @test1
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; UNALIGNED-NOT: andl $-{{..}}, %esp
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; UNALIGNED: movdqu {{.*}} # 16-byte Folded Spill
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; UNALIGNED-NOT: paddd {{.*}} # 16-byte Folded Reload
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; ALIGNED-LABEL: @test1
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; ALIGNED-NOT: andl $-{{..}}, %esp
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; ALIGNED: movdqa {{.*}} # 16-byte Spill
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; ALIGNED: paddd {{.*}} # 16-byte Folded Reload
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; FORCEALIGNED-LABEL: @test1
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; FORCEALIGNED: andl $-{{..}}, %esp
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; FORCEALIGNED: movdqa {{.*}} # 16-byte Spill
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; FORCEALIGNED: paddd {{.*}} # 16-byte Folded Reload
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}
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