1571b1271e
Summary: Do not break musttail invariant by promoting arguments of musttail callee or caller. Reviewers: sanjoy, dberlin, hfinkel, george.burgess.iv, fhahn, rnk Reviewed By: rnk Subscribers: rnk, llvm-commits Differential Revision: https://reviews.llvm.org/D43926 llvm-svn: 326521
46 lines
1.1 KiB
LLVM
46 lines
1.1 KiB
LLVM
; RUN: opt < %s -argpromotion -S | FileCheck %s
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; PR36543
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; Don't promote arguments of musttail callee
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%T = type { i32, i32, i32, i32 }
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; CHECK-LABEL: define internal i32 @test(%T* %p)
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define internal i32 @test(%T* %p) {
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%a.gep = getelementptr %T, %T* %p, i64 0, i32 3
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%b.gep = getelementptr %T, %T* %p, i64 0, i32 2
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%a = load i32, i32* %a.gep
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%b = load i32, i32* %b.gep
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%v = add i32 %a, %b
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ret i32 %v
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}
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; CHECK-LABEL: define i32 @caller(%T* %p)
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define i32 @caller(%T* %p) {
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%v = musttail call i32 @test(%T* %p)
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ret i32 %v
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}
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; Don't promote arguments of musttail caller
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define i32 @foo(%T* %p, i32 %v) {
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ret i32 0
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}
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; CHECK-LABEL: define internal i32 @test2(%T* %p, i32 %p2)
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define internal i32 @test2(%T* %p, i32 %p2) {
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%a.gep = getelementptr %T, %T* %p, i64 0, i32 3
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%b.gep = getelementptr %T, %T* %p, i64 0, i32 2
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%a = load i32, i32* %a.gep
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%b = load i32, i32* %b.gep
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%v = add i32 %a, %b
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%ca = musttail call i32 @foo(%T* undef, i32 %v)
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ret i32 %ca
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}
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; CHECK-LABEL: define i32 @caller2(%T* %g)
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define i32 @caller2(%T* %g) {
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%v = call i32 @test2(%T* %g, i32 0)
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ret i32 %v
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}
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