80c6ec11d9
The inalloca parameter has to be the only parameter passed in memory. Changing the convention to fastcc can break that. At some point we should teach global opt how to optimize ABI attributes like inalloca and maybe byval. These attributes are mainly used to match C ABIs. They are harder for LLVM to optimize and they don't always generate the best code. Fixes PR38487 llvm-svn: 339360
56 lines
1.3 KiB
LLVM
56 lines
1.3 KiB
LLVM
; RUN: opt < %s -globalopt -S | FileCheck %s
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define internal i32 @f(i32* %m) {
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; CHECK-LABEL: define internal fastcc i32 @f
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%v = load i32, i32* %m
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ret i32 %v
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}
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define internal x86_thiscallcc i32 @g(i32* %m) {
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; CHECK-LABEL: define internal fastcc i32 @g
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%v = load i32, i32* %m
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ret i32 %v
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}
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; Leave this one alone, because the user went out of their way to request this
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; convention.
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define internal coldcc i32 @h(i32* %m) {
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; CHECK-LABEL: define internal coldcc i32 @h
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%v = load i32, i32* %m
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ret i32 %v
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}
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define internal i32 @j(i32* %m) {
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; CHECK-LABEL: define internal i32 @j
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%v = load i32, i32* %m
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ret i32 %v
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}
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define internal i32 @inalloca(i32* inalloca %p) {
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; CHECK-LABEL: define internal i32 @inalloca(i32* inalloca %p)
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%rv = load i32, i32* %p
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ret i32 %rv
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}
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define void @call_things() {
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%m = alloca i32
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call i32 @f(i32* %m)
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call x86_thiscallcc i32 @g(i32* %m)
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call coldcc i32 @h(i32* %m)
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call i32 @j(i32* %m)
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%args = alloca inalloca i32
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call i32 @inalloca(i32* inalloca %args)
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ret void
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}
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@llvm.used = appending global [1 x i8*] [
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i8* bitcast (i32(i32*)* @j to i8*)
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], section "llvm.metadata"
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; CHECK-LABEL: define void @call_things()
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; CHECK: call fastcc i32 @f
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; CHECK: call fastcc i32 @g
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; CHECK: call coldcc i32 @h
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; CHECK: call i32 @j
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; CHECK: call i32 @inalloca(i32* inalloca %args)
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