derek.holloway
7502bf64a4
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53 lines
1.4 KiB
LLVM
53 lines
1.4 KiB
LLVM
; RUN: llc < %s -mtriple=i686-windows -stackrealign | FileCheck %s
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declare void @good(i32 %a, i32 %b, i32 %c, i32 %d)
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declare void @oneparam(i32 %a)
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declare void @eightparams(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h)
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; When there is no reserved call frame, check that additional alignment
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; is added when the pushes don't add up to the required alignment.
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; CHECK-LABEL: test5:
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; CHECK: subl $16, %esp
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; CHECK-NEXT: pushl $4
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; CHECK-NEXT: pushl $3
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; CHECK-NEXT: pushl $2
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; CHECK-NEXT: pushl $1
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; CHECK-NEXT: call
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define void @test5(i32 %k) {
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entry:
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%a = alloca i32, i32 %k
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call void @good(i32 1, i32 2, i32 3, i32 4)
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ret void
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}
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; When the alignment adds up, do the transformation
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; CHECK-LABEL: test5b:
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; CHECK: pushl $8
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; CHECK-NEXT: pushl $7
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; CHECK-NEXT: pushl $6
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; CHECK-NEXT: pushl $5
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; CHECK-NEXT: pushl $4
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; CHECK-NEXT: pushl $3
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; CHECK-NEXT: pushl $2
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; CHECK-NEXT: pushl $1
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; CHECK-NEXT: call
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define void @test5b() optsize {
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entry:
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call void @eightparams(i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8)
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ret void
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}
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; When having to compensate for the alignment isn't worth it,
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; don't use pushes.
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; CHECK-LABEL: test5c:
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; CHECK: movl $1, (%esp)
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; CHECK-NEXT: call
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define void @test5c() optsize {
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entry:
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call void @oneparam(i32 1)
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ret void
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}
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!llvm.module.flags = !{!0}
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!0 = !{i32 2, !"override-stack-alignment", i32 32}
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