http://llvm.org/bugs/show_bug.cgi?id=6806
Summary: Codegen regression "Instruction does not dominate all
uses!"
Product: new-bugs
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Created an attachment (id=4659)
--> (http://llvm.org/bugs/attachment.cgi?id=4659)
testcase .ll
The dragonegg self-host build broke recently, due to this recent regression
(occurs while building SelectionDAGBuilder). Here's the bugpoint reduced
testcase:
$ llc domcrash.bc
Instruction does not dominate all uses!
%uglygep78 = bitcast i8* %uglygep7 to %"struct CaseBits&" ; <%"struct
CaseBits&"> [#uses=1]
%1 = bitcast %"struct CaseBits&" %uglygep78 to i8* ; <i8*> [#uses=2]
Instruction does not dominate all uses!
%1 = bitcast %"struct CaseBits&" %uglygep78 to i8* ; <i8*> [#uses=2]
%uglygep4 = getelementptr i8* %1, i64 16 ; <i8*> [#uses=1]
Instruction does not dominate all uses!
%uglygep4 = getelementptr i8* %1, i64 16 ; <i8*> [#uses=1]
%uglygep45 = bitcast i8* %uglygep4 to %"struct CaseBits&" ; <%"struct
CaseBits&"> [#uses=1]
Instruction does not dominate all uses!
%uglygep45 = bitcast i8* %uglygep4 to %"struct CaseBits&" ; <%"struct
CaseBits&"> [#uses=1]
%uglygep456 = bitcast %"struct CaseBits&" %uglygep45 to i8* ; <i8*> [#uses=1]
Instruction does not dominate all uses!
%uglygep456 = bitcast %"struct CaseBits&" %uglygep45 to i8* ; <i8*> [#uses=1]
%uglygep7 = getelementptr i8* %uglygep456, i64 -16 ; <i8*> [#uses=1]
Instruction does not dominate all uses!
%uglygep7 = getelementptr i8* %uglygep456, i64 -16 ; <i8*> [#uses=1]
%uglygep78 = bitcast i8* %uglygep7 to %"struct CaseBits&" ; <%"struct
CaseBits&"> [#uses=1]
Instruction does not dominate all uses!
%1 = bitcast %"struct CaseBits&" %uglygep78 to i8* ; <i8*> [#uses=2]
%uglygep = getelementptr i8* %1, i64 16 ; <i8*> [#uses=1]
Instruction does not dominate all uses!
%uglygep = getelementptr i8* %1, i64 16 ; <i8*> [#uses=1]
%scevgep2 = getelementptr i8* %uglygep, i64 %lsr.iv ; <i8*> [#uses=1]
Instruction does not dominate all uses!
%scevgep2 = getelementptr i8* %uglygep, i64 %lsr.iv ; <i8*> [#uses=1]
%scevgep23 = bitcast i8* %scevgep2 to i32* ; <i32*> [#uses=1]
Instruction does not dominate all uses!
%scevgep23 = bitcast i8* %scevgep2 to i32* ; <i32*> [#uses=1]
store i32 undef, i32* %scevgep23, align 4
Broken module found, compilation aborted!
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