9d172c8e9c
This switches to using DSE + MemorySSA by default again, after fixing the issues reported after the first commit. Notable fixesfc82006331,a0017c2bc2. This reverts commit3a59628f3c.
24 lines
725 B
LLVM
24 lines
725 B
LLVM
; RUN: opt -dse -S < %s | FileCheck %s
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; Don't eliminate stores to allocas before tail calls to functions that use
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; byval. It's correct to mark calls like these as 'tail'. To implement this tail
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; call, the backend should copy the bytes from the alloca into the argument area
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; before clearing the stack.
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target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
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target triple = "i386-unknown-linux-gnu"
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declare void @g(i32* byval %p)
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define void @f(i32* byval %x) {
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entry:
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%p = alloca i32
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%v = load i32, i32* %x
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store i32 %v, i32* %p
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tail call void @g(i32* byval %p)
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ret void
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}
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; CHECK-LABEL: define void @f(i32* byval %x)
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; CHECK: store i32 %v, i32* %p
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; CHECK: tail call void @g(i32* byval %p)
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