89 lines
3.5 KiB
LLVM
89 lines
3.5 KiB
LLVM
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; RUN: opt < %s -globalopt -S | FileCheck %s
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declare token @llvm.call.preallocated.setup(i32)
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declare i8* @llvm.call.preallocated.arg(token, i32)
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declare i32 @__CxxFrameHandler3(...)
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; Don't touch functions with any musttail calls
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define internal i32 @preallocated_musttail(i32* preallocated(i32) %p) {
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; CHECK-LABEL: define internal i32 @preallocated_musttail(i32* preallocated(i32) %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 i32 @call_preallocated_musttail(i32* preallocated(i32) %a) {
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%r = musttail call i32 @preallocated_musttail(i32* preallocated(i32) %a)
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ret i32 %r
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}
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; CHECK-LABEL: define i32 @call_preallocated_musttail(i32* preallocated(i32) %a)
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; CHECK: musttail call i32 @preallocated_musttail(i32* preallocated(i32) %a)
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define i32 @call_preallocated_musttail_without_musttail() {
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%c = call token @llvm.call.preallocated.setup(i32 1)
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%N = call i8* @llvm.call.preallocated.arg(token %c, i32 0) preallocated(i32)
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%n = bitcast i8* %N to i32*
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%r = call i32 @preallocated_musttail(i32* preallocated(i32) %n) ["preallocated"(token %c)]
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ret i32 %r
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}
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; CHECK-LABEL: define i32 @call_preallocated_musttail_without_musttail()
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; CHECK: call i32 @preallocated_musttail(i32* preallocated(i32) %n)
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; Check that only one alloca per preallocated arg
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define internal i32 @preallocated(i32* preallocated(i32) %a) {
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; CHECK-LABEL: define internal fastcc i32 @preallocated(i32* %a)
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%rv = load i32, i32* %a
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ret i32 %rv
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}
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declare void @foo(i8*)
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define i32 @call_preallocated_multiple_args() {
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; CHECK-LABEL: define i32 @call_preallocated_multiple_args()
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; CHECK-NEXT: [[SS:%[0-9a-zA-Z_]+]] = call i8* @llvm.stacksave()
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; CHECK-NEXT: [[ARG0:%[0-9a-zA-Z_]+]] = alloca i32
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; CHECK-NEXT: [[ARG1:%[0-9a-zA-Z_]+]] = bitcast i32* [[ARG0]] to i8*
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; CHECK-NEXT: call void @foo(i8* [[ARG1]])
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; CHECK-NEXT: call void @foo(i8* [[ARG1]])
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; CHECK-NEXT: call void @foo(i8* [[ARG1]])
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; CHECK-NEXT: [[ARG2:%[0-9a-zA-Z_]+]] = bitcast i8* [[ARG1]] to i32*
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; CHECK-NEXT: call fastcc i32 @preallocated(i32* [[ARG2]])
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; CHECK-NEXT: call void @llvm.stackrestore(i8* [[SS]])
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; CHECK-NEXT: ret
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%c = call token @llvm.call.preallocated.setup(i32 1)
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%a1 = call i8* @llvm.call.preallocated.arg(token %c, i32 0) preallocated(i32)
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call void @foo(i8* %a1)
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%a2 = call i8* @llvm.call.preallocated.arg(token %c, i32 0) preallocated(i32)
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call void @foo(i8* %a2)
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%a3 = call i8* @llvm.call.preallocated.arg(token %c, i32 0) preallocated(i32)
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call void @foo(i8* %a3)
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%b = bitcast i8* %a3 to i32*
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%r = call i32 @preallocated(i32* preallocated(i32) %b) ["preallocated"(token %c)]
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ret i32 %r
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}
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; Don't touch functions with any invokes
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define internal i32 @preallocated_invoke(i32* preallocated(i32) %p) {
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; CHECK-LABEL: define internal i32 @preallocated_invoke(i32* preallocated(i32) %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 i32 @call_preallocated_invoke() personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
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%c = call token @llvm.call.preallocated.setup(i32 1)
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%a = call i8* @llvm.call.preallocated.arg(token %c, i32 0) preallocated(i32)
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%b = bitcast i8* %a to i32*
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%r = invoke i32 @preallocated_invoke(i32* preallocated(i32) %b) ["preallocated"(token %c)]
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to label %conta unwind label %contb
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conta:
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ret i32 %r
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contb:
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%s = catchswitch within none [label %catch] unwind to caller
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catch:
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%p = catchpad within %s []
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catchret from %p to label %cont
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cont:
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ret i32 42
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}
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; CHECK-LABEL: define i32 @call_preallocated_invoke()
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; CHECK: invoke i32 @preallocated_invoke(i32* preallocated(i32) %b)
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