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[Hexagon] Properly update kill flags in HexagonNewValueJump

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The feeder instruction will be moved to right before the compare, so
the updating code should not be looking for kills past the compare.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@306059 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Krzysztof Parzyszek 2017-06-22 21:11:44 +00:00
parent 08ef6db991
commit b03a7e10d5
2 changed files with 54 additions and 1 deletions
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2
lib/Target/Hexagon/HexagonNewValueJump.cpp
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@ -629,7 +629,7 @@ bool HexagonNewValueJump::runOnMachineFunction(MachineFunction &MF) {
if (MO.isReg() && MO.isUse()) {
unsigned feederReg = MO.getReg();
for (MachineBasicBlock::iterator localII = feederPos,
end = jmpPos; localII != end; localII++) {
end = cmpInstr->getIterator(); localII != end; localII++) {
MachineInstr &localMI = *localII;
for (unsigned j = 0; j < localMI.getNumOperands(); j++) {
MachineOperand &localMO = localMI.getOperand(j);

53
test/CodeGen/Hexagon/newvaluejump-kill.ll Normal file
View File

@ -0,0 +1,53 @@
; RUN: llc -march=hexagon -O3 -verify-machineinstrs < %s | FileCheck %s
;
; Check that this testcase compiles successfully and that a new-value jump
; has been created.
; CHECK: if (cmp.gtu(r{{[0-9]+}}.new,r{{[0-9]+}})) jump
target triple = "hexagon"
@g0 = external hidden unnamed_addr global [182 x i16], align 8
define void @fred(i16 signext %a0) local_unnamed_addr #0 {
b1:
%v2 = getelementptr inbounds [182 x i16], [182 x i16]* @g0, i32 0, i32 0
%v3 = sext i16 %a0 to i32
%v4 = call i32 @llvm.hexagon.A2.asrh(i32 undef)
%v5 = trunc i32 %v4 to i16
br i1 undef, label %b6, label %b14
b6: ; preds = %b1
%v7 = sext i16 %v5 to i32
br label %b8
b8: ; preds = %b8, %b6
%v9 = phi i32 [ 128, %b6 ], [ %v13, %b8 ]
%v10 = sub nsw i32 %v9, %v7
%v11 = getelementptr inbounds [182 x i16], [182 x i16]* @g0, i32 0, i32 %v10
%v12 = load i16, i16* %v11, align 2
%v13 = add nuw nsw i32 %v9, 1
br label %b8
b14: ; preds = %b1
br i1 undef, label %b16, label %b15
b15: ; preds = %b14
unreachable
b16: ; preds = %b14
%v17 = getelementptr [182 x i16], [182 x i16]* @g0, i32 0, i32 %v3
%v18 = icmp ugt i16* %v17, %v2
%v19 = or i1 %v18, undef
br i1 %v19, label %b20, label %b21
b20: ; preds = %b16
unreachable
b21: ; preds = %b16
ret void
}
declare i32 @llvm.hexagon.A2.asrh(i32) #1
attributes #0 = { nounwind "target-cpu"="hexagonv62" }
attributes #1 = { nounwind readnone }