maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/CodeGen/PowerPC/ashr-neg1.ll

19 lines
567 B
LLVM
Raw Normal View History

Adding -verify-machineinstrs option to PowerPC tests Currently we have a number of tests that fail with -verify-machineinstrs. To detect this cases earlier we add the option to the testcases with the exception of tests that will currently fail with this option. PR 27456 keeps track of this failures. No code review, as discussed with Hal Finkel. llvm-svn: 277624
2016-08-04 02:17:35 +08:00
; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 < %s
Don't crash in SE dealing with ashr x, -1 ScalarEvolution::getSignedRange uses ComputeNumSignBits from ValueTracking on ashr instructions. ComputeNumSignBits can return zero, but this case was not handled correctly by the code in getSignedRange which was calling: APInt::getSignedMinValue(BitWidth).ashr(NS - 1) with NS = 0, resulting in an assertion failure in APInt::ashr. Now, we just return the conservative result (as with NS == 1). Another bug found by llvm-stress. llvm-svn: 185955
2013-07-10 02:16:16 +08:00
target triple = "powerpc64-unknown-linux-gnu"
define void @autogen_SD30723(i32) {
BB:
br label %CF80
CF80: ; preds = %CF80, %BB
%B = ashr i32 %0, -1
br i1 undef, label %CF80, label %CF84
CF84: ; preds = %CF84, %CF80
%Cmp62 = icmp sge i32 undef, %B
br i1 %Cmp62, label %CF84, label %CF85
CF85: ; preds = %CF85, %CF84
br label %CF85
}