forked from OSchip/llvm-project
220 lines
6.3 KiB
LLVM
220 lines
6.3 KiB
LLVM
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; RUN: opt < %s -inline -S | FileCheck %s
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; RUN: opt < %s -passes='cgscc(inline)' -S | FileCheck %s
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; We have to apply the less restrictive TailCallKind of the call site being
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; inlined and any call sites cloned into the caller.
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; No tail marker after inlining, since test_capture_c captures an alloca.
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; CHECK: define void @test_capture_a(
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; CHECK-NOT: tail
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; CHECK: call void @test_capture_c(
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declare void @test_capture_c(i32*)
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define internal void @test_capture_b(i32* %P) {
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tail call void @test_capture_c(i32* %P)
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ret void
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}
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define void @test_capture_a() {
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%A = alloca i32 ; captured by test_capture_b
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call void @test_capture_b(i32* %A)
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ret void
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}
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; No musttail marker after inlining, since the prototypes don't match.
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; CHECK: define void @test_proto_mismatch_a(
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; CHECK-NOT: musttail
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; CHECK: call void @test_proto_mismatch_c(
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declare void @test_proto_mismatch_c(i32*)
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define internal void @test_proto_mismatch_b(i32* %p) {
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musttail call void @test_proto_mismatch_c(i32* %p)
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ret void
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}
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define void @test_proto_mismatch_a() {
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call void @test_proto_mismatch_b(i32* null)
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ret void
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}
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; After inlining through a musttail call site, we need to keep musttail markers
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; to prevent unbounded stack growth.
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; CHECK: define void @test_musttail_basic_a(
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; CHECK: musttail call void @test_musttail_basic_c(
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declare void @test_musttail_basic_c(i32* %p)
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define internal void @test_musttail_basic_b(i32* %p) {
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musttail call void @test_musttail_basic_c(i32* %p)
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ret void
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}
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define void @test_musttail_basic_a(i32* %p) {
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musttail call void @test_musttail_basic_b(i32* %p)
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ret void
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}
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; Don't insert lifetime end markers here, the lifetime is trivially over due
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; the return.
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; CHECK: define void @test_byval_a(
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; CHECK: musttail call void @test_byval_c(
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; CHECK-NEXT: ret void
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declare void @test_byval_c(i32* byval %p)
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define internal void @test_byval_b(i32* byval %p) {
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musttail call void @test_byval_c(i32* byval %p)
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ret void
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}
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define void @test_byval_a(i32* byval %p) {
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musttail call void @test_byval_b(i32* byval %p)
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ret void
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}
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; Don't insert a stack restore, we're about to return.
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; CHECK: define void @test_dynalloca_a(
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; CHECK: call i8* @llvm.stacksave(
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; CHECK: alloca i8, i32 %n
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; CHECK: musttail call void @test_dynalloca_c(
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; CHECK-NEXT: ret void
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declare void @escape(i8* %buf)
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declare void @test_dynalloca_c(i32* byval %p, i32 %n)
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define internal void @test_dynalloca_b(i32* byval %p, i32 %n) alwaysinline {
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%buf = alloca i8, i32 %n ; dynamic alloca
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call void @escape(i8* %buf) ; escape it
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musttail call void @test_dynalloca_c(i32* byval %p, i32 %n)
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ret void
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}
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define void @test_dynalloca_a(i32* byval %p, i32 %n) {
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musttail call void @test_dynalloca_b(i32* byval %p, i32 %n)
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ret void
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}
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; We can't merge the returns.
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; CHECK: define void @test_multiret_a(
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; CHECK: musttail call void @test_multiret_c(
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; CHECK-NEXT: ret void
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; CHECK: musttail call void @test_multiret_d(
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; CHECK-NEXT: ret void
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declare void @test_multiret_c(i1 zeroext %b)
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declare void @test_multiret_d(i1 zeroext %b)
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define internal void @test_multiret_b(i1 zeroext %b) {
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br i1 %b, label %c, label %d
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c:
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musttail call void @test_multiret_c(i1 zeroext %b)
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ret void
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d:
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musttail call void @test_multiret_d(i1 zeroext %b)
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ret void
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}
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define void @test_multiret_a(i1 zeroext %b) {
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musttail call void @test_multiret_b(i1 zeroext %b)
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ret void
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}
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; We have to avoid bitcast chains.
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; CHECK: define i32* @test_retptr_a(
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; CHECK: musttail call i8* @test_retptr_c(
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; CHECK-NEXT: bitcast i8* {{.*}} to i32*
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; CHECK-NEXT: ret i32*
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declare i8* @test_retptr_c()
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define internal i16* @test_retptr_b() {
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%rv = musttail call i8* @test_retptr_c()
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%v = bitcast i8* %rv to i16*
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ret i16* %v
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}
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define i32* @test_retptr_a() {
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%rv = musttail call i16* @test_retptr_b()
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%v = bitcast i16* %rv to i32*
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ret i32* %v
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}
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; Combine the last two cases: multiple returns with pointer bitcasts.
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; CHECK: define i32* @test_multiptrret_a(
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; CHECK: musttail call i8* @test_multiptrret_c(
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; CHECK-NEXT: bitcast i8* {{.*}} to i32*
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; CHECK-NEXT: ret i32*
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; CHECK: musttail call i8* @test_multiptrret_d(
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; CHECK-NEXT: bitcast i8* {{.*}} to i32*
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; CHECK-NEXT: ret i32*
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declare i8* @test_multiptrret_c(i1 zeroext %b)
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declare i8* @test_multiptrret_d(i1 zeroext %b)
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define internal i16* @test_multiptrret_b(i1 zeroext %b) {
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br i1 %b, label %c, label %d
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c:
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%c_rv = musttail call i8* @test_multiptrret_c(i1 zeroext %b)
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%c_v = bitcast i8* %c_rv to i16*
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ret i16* %c_v
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d:
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%d_rv = musttail call i8* @test_multiptrret_d(i1 zeroext %b)
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%d_v = bitcast i8* %d_rv to i16*
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ret i16* %d_v
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}
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define i32* @test_multiptrret_a(i1 zeroext %b) {
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%rv = musttail call i16* @test_multiptrret_b(i1 zeroext %b)
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%v = bitcast i16* %rv to i32*
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ret i32* %v
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}
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; Inline a musttail call site which contains a normal return and a musttail call.
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; CHECK: define i32 @test_mixedret_a(
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; CHECK: br i1 %b
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; CHECK: musttail call i32 @test_mixedret_c(
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; CHECK-NEXT: ret i32
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; CHECK: call i32 @test_mixedret_d(i1 zeroext %b)
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; CHECK: add i32 1,
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; CHECK-NOT: br
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; CHECK: ret i32
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declare i32 @test_mixedret_c(i1 zeroext %b)
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declare i32 @test_mixedret_d(i1 zeroext %b)
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define internal i32 @test_mixedret_b(i1 zeroext %b) {
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br i1 %b, label %c, label %d
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c:
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%c_rv = musttail call i32 @test_mixedret_c(i1 zeroext %b)
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ret i32 %c_rv
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d:
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%d_rv = call i32 @test_mixedret_d(i1 zeroext %b)
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%d_rv1 = add i32 1, %d_rv
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ret i32 %d_rv1
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}
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define i32 @test_mixedret_a(i1 zeroext %b) {
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%rv = musttail call i32 @test_mixedret_b(i1 zeroext %b)
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ret i32 %rv
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}
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declare i32 @donttailcall()
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define i32 @notail() {
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%rv = notail call i32 @donttailcall()
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ret i32 %rv
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}
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; CHECK: @test_notail
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; CHECK: notail call i32 @donttailcall
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; CHECK: ret
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define i32 @test_notail() {
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%rv = tail call i32 @notail()
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ret i32 %rv
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}
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; PR31014: Inlining a musttail call through a notail call site should remove
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; any tail marking, otherwise we break verifier invariants.
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declare void @do_ret(i32)
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define void @test_notail_inline_musttail(i32 %a) {
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notail call void @inline_musttail(i32 %a)
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musttail call void @do_ret(i32 %a)
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ret void
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}
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define internal void @inline_musttail(i32 %a) {
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musttail call void @do_ret(i32 %a)
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ret void
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}
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; CHECK-LABEL: define void @test_notail_inline_musttail(i32 %a)
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; CHECK: {{^ *}}call void @do_ret(i32 %a)
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; CHECK: musttail call void @do_ret(i32 %a)
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; CHECK: ret void
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