Instruction does not dominate all uses!

[JonPsson]

Bugzilla Link	34619
Resolution	FIXED
Resolved on	Sep 16, 2017 07:50
Version	trunk
OS	Linux
Blocks	#30135
Attachments	reduced testcase
CC	@alexey-bataev,@dtemirbulatov,@hfinkel,@RKSimon,@JonPsson,@uweigand

Extended Description

It seems that trunk@313348 showed up in a git bisect for the following crash with opt:

bin/opt -S -O3 -mtriple=systemz-unknown -mcpu=z13 tc_domuses.ll -o out.ll
Instruction does not dominate all uses!
%10 = load i32, i32* getelementptr inbounds ([4 x [4 x i32]], [4 x [4 x i32]]* @​dct_luma.m4, i64 0, i64 3, i64 0), align 4, !tbaa !​1
%3 = insertelement <4 x i32> undef, i32 %10, i32 0
Instruction does not dominate all uses!
%11 = load i32, i32* getelementptr inbounds ([4 x [4 x i32]], [4 x [4 x i32]]* @​dct_luma.m4, i64 0, i64 3, i64 2), align 4, !tbaa !​1
%5 = insertelement <4 x i32> %4, i32 %11, i32 2
Instruction does not dominate all uses!
%12 = load i32, i32* getelementptr inbounds ([4 x [4 x i32]], [4 x [4 x i32]]* @​dct_luma.m4, i64 0, i64 3, i64 3), align 4, !tbaa !​1
%6 = insertelement <4 x i32> %5, i32 %12, i32 3
LLVM ERROR: Broken function found, compilation aborted!

[JonPsson]

assigned to @dtemirbulatov

[alexey-bataev]

Tried with the latest top, unable to reproduce

[RKSimon]

Tried with the latest top, unable to reproduce

rL313352 reverted rL313348

[alexey-bataev]

Ahh, I see. It is better to ask Dinar to investigate this.

[llvmbot]

Fixed with the revert, please include this case if you plan to commit again.