llvm/test/CodeGen/X86/tail-call-casts.ll
Hans Wennborg 2540538e40 [X86] Enable forwarding bool arguments in tail calls (PR26305)
The code was previously not able to track a boolean argument
at a call site back to the formal argument of the caller.

Differential Revision: http://reviews.llvm.org/D17786

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@262575 91177308-0d34-0410-b5e6-96231b3b80d8
2016-03-03 02:06:32 +00:00

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LLVM

; RUN: llc -mtriple=i686-unknown-linux-gnu -o - %s | FileCheck %s
declare void @g_bool(i1 zeroext)
define void @f_bool(i1 zeroext %x) {
entry:
tail call void @g_bool(i1 zeroext %x)
ret void
; Forwarding a bool in a tail call works.
; CHECK-LABEL: f_bool:
; CHECK-NOT: movz
; CHECK: jmp g_bool
}
declare void @g_float(float)
define void @f_i32(i32 %x) {
entry:
%0 = bitcast i32 %x to float
tail call void @g_float(float %0)
ret void
; Forwarding a bitcasted value works too.
; CHECK-LABEL: f_i32
; CHECK-NOT: mov
; CHECK: jmp g_float
}