forked from OSchip/llvm-project
125 lines
2.4 KiB
LLVM
125 lines
2.4 KiB
LLVM
; RUN: opt < %s -inline-threshold=0 -always-inline -S | FileCheck %s
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;
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; Ensure the threshold has no impact on these decisions.
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; RUN: opt < %s -inline-threshold=20000000 -always-inline -S | FileCheck %s
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; RUN: opt < %s -inline-threshold=-20000000 -always-inline -S | FileCheck %s
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define i32 @inner1() alwaysinline {
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ret i32 1
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}
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define i32 @outer1() {
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; CHECK-LABEL: @outer1(
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; CHECK-NOT: call
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; CHECK: ret
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%r = call i32 @inner1()
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ret i32 %r
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}
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; The always inliner can't DCE internal functions. PR2945
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; CHECK-LABEL: @pr2945(
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define internal i32 @pr2945() nounwind {
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ret i32 0
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}
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define internal void @inner2(i32 %N) alwaysinline {
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%P = alloca i32, i32 %N
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ret void
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}
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define void @outer2(i32 %N) {
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; The always inliner (unlike the normal one) should be willing to inline
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; a function with a dynamic alloca into one without a dynamic alloca.
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; rdar://6655932
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;
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; CHECK-LABEL: @outer2(
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; CHECK-NOT: call void @inner2
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; CHECK-NOT: call void @inner2
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; CHECK: ret void
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call void @inner2( i32 %N )
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ret void
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}
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declare i32 @a() returns_twice
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declare i32 @b() returns_twice
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define i32 @inner3() alwaysinline {
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entry:
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%call = call i32 @a() returns_twice
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%add = add nsw i32 1, %call
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ret i32 %add
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}
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define i32 @outer3() {
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entry:
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; CHECK-LABEL: @outer3(
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; CHECK-NOT: call i32 @a
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; CHECK: ret
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%call = call i32 @inner3()
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%add = add nsw i32 1, %call
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ret i32 %add
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}
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define i32 @inner4() alwaysinline returns_twice {
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entry:
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%call = call i32 @b() returns_twice
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%add = add nsw i32 1, %call
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ret i32 %add
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}
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define i32 @outer4() {
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entry:
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; CHECK-LABEL: @outer4(
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; CHECK: call i32 @b()
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; CHECK: ret
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%call = call i32 @inner4() returns_twice
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%add = add nsw i32 1, %call
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ret i32 %add
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}
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define i32 @inner5(i8* %addr) alwaysinline {
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entry:
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indirectbr i8* %addr, [ label %one, label %two ]
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one:
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ret i32 42
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two:
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ret i32 44
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}
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define i32 @outer5(i32 %x) {
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; CHECK-LABEL: @outer5(
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; CHECK: call i32 @inner5
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; CHECK: ret
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%cmp = icmp slt i32 %x, 42
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%addr = select i1 %cmp, i8* blockaddress(@inner5, %one), i8* blockaddress(@inner5, %two)
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%call = call i32 @inner5(i8* %addr)
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ret i32 %call
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}
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define void @inner6(i32 %x) alwaysinline {
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entry:
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%icmp = icmp slt i32 %x, 0
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br i1 %icmp, label %return, label %bb
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bb:
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%sub = sub nsw i32 %x, 1
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call void @inner6(i32 %sub)
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ret void
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return:
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ret void
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}
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define void @outer6() {
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; CHECK-LABEL: @outer6(
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; CHECK: call void @inner6(i32 42)
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; CHECK: ret
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entry:
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call void @inner6(i32 42)
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ret void
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}
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