b2e6b98783
Fix bug where Fast ISel incorrectly set `IncomingArgSize` to `0` for functions with no arguments, since `MIPS O32` uses _the reserved argument area_ of 16 bytes even for the functions with no args at all.
29 lines
848 B
LLVM
29 lines
848 B
LLVM
; RUN: llc -mtriple=mips-unknown-linux-gnu -mips-tail-calls=1 -O0 < %s | FileCheck %s
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; RUN: llc -mtriple=mips64-unknown-linux-gnu -mips-tail-calls=1 -O0 < %s | FileCheck %s
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; Test that musttail works correctly at -O0 when Fast ISel is used.
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; This is a regression test for a bug where Fast ISel incorrectly set
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; IncomingArgSize to 0 for functions with no arguments, causing the
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; tail call eligibility check to fail.
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@ptr = dso_local global ptr null, align 4
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define dso_local void @callee() {
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entry:
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%local = alloca i32, align 4
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store volatile i32 2, ptr %local, align 4
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ret void
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}
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; CHECK-LABEL: caller:
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; CHECK: j callee
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; CHECK-NOT: jal callee
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define dso_local void @caller() {
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entry:
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%local = alloca i32, align 4
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store i32 1, ptr %local, align 4
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store ptr %local, ptr @ptr, align 4
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musttail call void @callee()
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ret void
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}
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