mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-23 04:52:54 +02:00
5b78092546
Original message: Teach MachineCSE how to do simple cross-block CSE involving physregs. This allows, for example, eliminating duplicate cmpl's on x86. Part of rdar://problem/8259436 . llvm-svn: 130877
34 lines
956 B
LLVM
34 lines
956 B
LLVM
; RUN: llc < %s -mtriple=thumbv7-apple-darwin -mcpu=cortex-a8 | FileCheck %s
|
|
; rdar://7354379
|
|
|
|
declare double @floor(double) nounwind readnone
|
|
|
|
define void @t(i1 %a, double %b) {
|
|
entry:
|
|
br i1 %a, label %bb3, label %bb1
|
|
|
|
bb1: ; preds = %entry
|
|
unreachable
|
|
|
|
bb3: ; preds = %entry
|
|
br i1 %a, label %bb7, label %bb5
|
|
|
|
bb5: ; preds = %bb3
|
|
unreachable
|
|
|
|
bb7: ; preds = %bb3
|
|
br i1 %a, label %bb11, label %bb9
|
|
|
|
bb9: ; preds = %bb7
|
|
; CHECK: cmp r0, #0
|
|
; CHECK-NOT: cmp
|
|
; CHECK: cbnz
|
|
%0 = tail call double @floor(double %b) nounwind readnone ; <double> [#uses=0]
|
|
br label %bb11
|
|
|
|
bb11: ; preds = %bb9, %bb7
|
|
%1 = getelementptr i32* undef, i32 0
|
|
store i32 0, i32* %1
|
|
ret void
|
|
}
|