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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
Remove arm_apcscc from the test files. It is the default and doing this matches what llvm-gcc and clang now produce. llvm-svn: 106221
2010-06-17 23:18:27 +08:00
declare double @floor(double) nounwind readnone
Use cbz and cbnz instructions. llvm-svn: 85698
2009-11-01 07:46:45 +08:00
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
Allow ARM if-converter to be run after post allocation scheduling. - This fixed a number of bugs in if-converter, tail merging, and post-allocation scheduler. If-converter now runs branch folding / tail merging first to maximize if-conversion opportunities. - Also changed the t2IT instruction slightly. It now defines the ITSTATE register which is read by instructions in the IT block. - Added Thumb2 specific hazard recognizer to ensure the scheduler doesn't change the instruction ordering in the IT block (since IT mask has been finalized). It also ensures no other instructions can be scheduled between instructions in the IT block. This is not yet enabled. llvm-svn: 106344
2010-06-19 07:09:54 +08:00
; CHECK: cmp r0, #0
Fix tests. llvm-svn: 85723
2009-11-02 02:13:29 +08:00
; CHECK-NEXT: cbnz
Remove arm_apcscc from the test files. It is the default and doing this matches what llvm-gcc and clang now produce. llvm-svn: 106221
2010-06-17 23:18:27 +08:00
%0 = tail call double @floor(double %b) nounwind readnone ; <double> [#uses=0]
Use cbz and cbnz instructions. llvm-svn: 85698
2009-11-01 07:46:45 +08:00
br label %bb11
bb11: ; preds = %bb9, %bb7
%1 = getelementptr i32* undef, i32 0
store i32 0, i32* %1
ret void
}