45 lines
1.7 KiB
LLVM
45 lines
1.7 KiB
LLVM
; RUN: llc %s -o - -enable-shrink-wrap=true | FileCheck %s --check-prefix=CHECK --check-prefix=ENABLE
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; RUN: llc %s -o - -enable-shrink-wrap=false | FileCheck %s --check-prefix=CHECK --check-prefix=DISABLE
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target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
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target triple = "i686-pc-windows-msvc18.0.0"
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%struct.S = type { i32 }
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; Check that we do not use a basic block that has EFLAGS as live-in
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; if we need to realign the stack.
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; PR27531.
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; CHECK-LABEL: stackRealignment:
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; Prologue code.
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; CHECK: pushl
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; Make sure we actually perform some stack realignment.
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; CHECK: andl ${{[-0-9]+}}, %esp
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; This is the end of the entry block.
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; The prologue should have happened before that point because past
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; this point, EFLAGS is live.
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; CHECK: jg
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define x86_thiscallcc void @stackRealignment(%struct.S* %this) {
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entry:
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%data = alloca [1 x i32], align 4
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%d = alloca double, align 8
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%tmp = bitcast [1 x i32]* %data to i8*
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%arrayinit.begin = getelementptr inbounds [1 x i32], [1 x i32]* %data, i32 0, i32 0
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%x_ = getelementptr inbounds %struct.S, %struct.S* %this, i32 0, i32 0
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%tmp1 = load i32, i32* %x_, align 4
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%cmp = icmp sgt i32 %tmp1, 32
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%cond = select i1 %cmp, i32 42, i32 128
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store i32 %cond, i32* %arrayinit.begin, align 4
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%cmp3 = icmp slt i32 %tmp1, 32
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br i1 %cmp3, label %cleanup, label %if.end
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if.end: ; preds = %entry
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%tmp2 = bitcast double* %d to i8*
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call x86_thiscallcc void @bar(%struct.S* nonnull %this, i32* %arrayinit.begin, double* nonnull %d)
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br label %cleanup
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cleanup: ; preds = %if.end, %entry
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ret void
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}
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; Function Attrs: optsize
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declare x86_thiscallcc void @bar(%struct.S*, i32*, double*)
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