fastcc.ll
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; RUN: opt < %s -globalopt -S | FileCheck %s
declare token @llvm.call.preallocated.setup(i32)
declare i8* @llvm.call.preallocated.arg(token, i32)
define internal i32 @f(i32* %m) {
; CHECK-LABEL: define internal fastcc i32 @f
%v = load i32, i32* %m
ret i32 %v
}
define internal x86_thiscallcc i32 @g(i32* %m) {
; CHECK-LABEL: define internal fastcc i32 @g
%v = load i32, i32* %m
ret i32 %v
}
; Leave this one alone, because the user went out of their way to request this
; convention.
define internal coldcc i32 @h(i32* %m) {
; CHECK-LABEL: define internal coldcc i32 @h
%v = load i32, i32* %m
ret i32 %v
}
define internal i32 @j(i32* %m) {
; CHECK-LABEL: define internal i32 @j
%v = load i32, i32* %m
ret i32 %v
}
define internal i32 @inalloca(i32* inalloca %p) {
; CHECK-LABEL: define internal fastcc i32 @inalloca(i32* %p)
%rv = load i32, i32* %p
ret i32 %rv
}
define i32 @inalloca2_caller(i32* inalloca %p) {
%rv = musttail call i32 @inalloca2(i32* inalloca %p)
ret i32 %rv
}
define internal i32 @inalloca2(i32* inalloca %p) {
; Because of the musttail caller, this inalloca cannot be dropped.
; CHECK-LABEL: define internal i32 @inalloca2(i32* inalloca %p)
%rv = load i32, i32* %p
ret i32 %rv
}
define internal i32 @preallocated(i32* preallocated(i32) %p) {
; CHECK-LABEL: define internal fastcc i32 @preallocated(i32* %p)
%rv = load i32, i32* %p
ret i32 %rv
}
define void @call_things() {
%m = alloca i32
call i32 @f(i32* %m)
call x86_thiscallcc i32 @g(i32* %m)
call coldcc i32 @h(i32* %m)
call i32 @j(i32* %m)
%args = alloca inalloca i32
call i32 @inalloca(i32* inalloca %args)
%c = call token @llvm.call.preallocated.setup(i32 1)
%N = call i8* @llvm.call.preallocated.arg(token %c, i32 0) preallocated(i32)
%n = bitcast i8* %N to i32*
call i32 @preallocated(i32* preallocated(i32) %n) ["preallocated"(token %c)]
ret void
}
; CHECK-LABEL: define void @call_things()
; CHECK: call fastcc i32 @f
; CHECK: call fastcc i32 @g
; CHECK: call coldcc i32 @h
; CHECK: call i32 @j
; CHECK: call fastcc i32 @inalloca(i32* %args)
; CHECK-NOT: llvm.call.preallocated
; CHECK: call fastcc i32 @preallocated(i32* %n)
@llvm.used = appending global [1 x i8*] [
i8* bitcast (i32(i32*)* @j to i8*)
], section "llvm.metadata"