9ca064552a
When the function has musttail call - its cc is fixed to be equal to the cc of the musttail callee. In such case (and in the case of the musttail callee), GlobalOpt should not change the cc to fastcc as it will break the invariant. This fixes PR36546 Patch by: Fedor Indutny (indutny) Differential revision: https://reviews.llvm.org/D43859 llvm-svn: 326376
35 lines
779 B
LLVM
35 lines
779 B
LLVM
; RUN: opt < %s -globalopt -S | FileCheck %s
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; PR36546
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; Check that musttail callee preserves its calling convention
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define i32 @test(i32 %a) {
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; CHECK: %ca = musttail call i32 @foo(i32 %a)
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%ca = musttail call i32 @foo(i32 %a)
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ret i32 %ca
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}
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; CHECK-LABEL: define internal i32 @foo(i32 %a)
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define internal i32 @foo(i32 %a) {
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ret i32 %a
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}
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; Check that musttail caller preserves its calling convention
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define i32 @test2(i32 %a) {
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%ca = call i32 @foo1(i32 %a)
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ret i32 %ca
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}
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; CHECK-LABEL: define internal i32 @foo1(i32 %a)
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define internal i32 @foo1(i32 %a) {
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; CHECK: %ca = musttail call i32 @foo2(i32 %a)
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%ca = musttail call i32 @foo2(i32 %a)
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ret i32 %ca
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}
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; CHECK-LABEL: define internal i32 @foo2(i32 %a)
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define internal i32 @foo2(i32 %a) {
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ret i32 %a
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}
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