http://llvm.org/bugs/show_bug.cgi?id=3197
Summary: llvm.umul.with.overflow.i32 broken on x86
Product: new-bugs
Version: unspecified
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: new bugs
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
CC: [email protected]
Per summary; simple testcase below.
declare {i32, i1} @llvm.umul.with.overflow.i32(i32, i32)
define i32 @main() nounwind {
entry:
%t = call {i32, i1} @llvm.umul.with.overflow.i32(i32 -1, i32 -1)
%sum = extractvalue {i32, i1} %t, 0
%obit = extractvalue {i32, i1} %t, 1 ; This should be 1
%notobit = xor i1 %obit, 1
%ret = zext i1 %notobit to i32
ret i32 %ret ; This should return 0
}
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