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llvm-project/llvm/test/CodeGen/Thumb2/thumb2-cbnz.ll

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Use cbz and cbnz instructions. llvm-svn: 85698
2009-11-01 07:46:45 +08:00
; RUN: llc < %s -mtriple=thumbv7-apple-darwin -mcpu=cortex-a8 | FileCheck %s
; rdar://7354379
declare arm_apcscc 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
Add support for tail duplication to BranchFolding, and extend tail merging support to handle more cases. - Recognize several cases where tail merging is beneficial even when the tail size is smaller than the generic threshold. - Make use of MachineInstrDesc::isBarrier to help detect non-fallthrough blocks. - Check for and avoid disrupting fall-through edges in more cases. llvm-svn: 86871
2009-11-12 03:48:59 +08:00
; CHECK: cmp r0, #0
; CHECK-NEXT: cmp r0, #0
Fix tests. llvm-svn: 85723
2009-11-02 02:13:29 +08:00
; CHECK-NEXT: cbnz
Use cbz and cbnz instructions. llvm-svn: 85698
2009-11-01 07:46:45 +08:00
%0 = tail call arm_apcscc 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
}