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5ceb906da9
Summary: These ADJCALLSTACK markers don't generate code, but they keep dynamic alloca code that calls chkstk out of the prologue. This slightly pessimizes inalloca calls by preventing some register copy coalescing, but I can live with that. Reviewers: qcolombet Subscribers: hans, llvm-commits Differential Revision: http://reviews.llvm.org/D15200 llvm-svn: 254645
66 lines
1.7 KiB
LLVM
66 lines
1.7 KiB
LLVM
; RUN: llc < %s -mtriple=i686-pc-win32 | FileCheck %s
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%Foo = type { i32, i32 }
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declare void @f(%Foo* inalloca %b)
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define void @a() {
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; CHECK-LABEL: _a:
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entry:
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%b = alloca inalloca %Foo
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; CHECK: movl $8, %eax
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; CHECK: calll __chkstk
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%f1 = getelementptr %Foo, %Foo* %b, i32 0, i32 0
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%f2 = getelementptr %Foo, %Foo* %b, i32 0, i32 1
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store i32 13, i32* %f1
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store i32 42, i32* %f2
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; CHECK: movl %esp, %eax
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; CHECK: movl $13, (%eax)
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; CHECK: movl $42, 4(%eax)
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call void @f(%Foo* inalloca %b)
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; CHECK: calll _f
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ret void
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}
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declare void @inreg_with_inalloca(i32 inreg %a, %Foo* inalloca %b)
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define void @b() {
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; CHECK-LABEL: _b:
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entry:
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%b = alloca inalloca %Foo
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; CHECK: movl $8, %eax
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; CHECK: calll __chkstk
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%f1 = getelementptr %Foo, %Foo* %b, i32 0, i32 0
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%f2 = getelementptr %Foo, %Foo* %b, i32 0, i32 1
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store i32 13, i32* %f1
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store i32 42, i32* %f2
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; CHECK: movl %esp, %eax
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; CHECK: movl $13, (%eax)
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; CHECK: movl $42, 4(%eax)
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call void @inreg_with_inalloca(i32 inreg 1, %Foo* inalloca %b)
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; CHECK: movl $1, %eax
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; CHECK: calll _inreg_with_inalloca
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ret void
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}
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declare x86_thiscallcc void @thiscall_with_inalloca(i8* %a, %Foo* inalloca %b)
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define void @c() {
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; CHECK-LABEL: _c:
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entry:
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%b = alloca inalloca %Foo
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; CHECK: movl $8, %eax
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; CHECK: calll __chkstk
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%f1 = getelementptr %Foo, %Foo* %b, i32 0, i32 0
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%f2 = getelementptr %Foo, %Foo* %b, i32 0, i32 1
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store i32 13, i32* %f1
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store i32 42, i32* %f2
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; CHECK: movl %esp, %eax
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; CHECK-DAG: movl $13, (%eax)
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; CHECK-DAG: movl $42, 4(%eax)
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call x86_thiscallcc void @thiscall_with_inalloca(i8* null, %Foo* inalloca %b)
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; CHECK-DAG: xorl %ecx, %ecx
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; CHECK: calll _thiscall_with_inalloca
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ret void
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}
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