952e069393
This is UB and allows the compiler to give any result, so these tests weren't meaningful InstCombine tests are now clean of 'br undef'
40 lines
1016 B
LLVM
40 lines
1016 B
LLVM
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
|
|
|
|
; CHECK: no_crash
|
|
define float @no_crash(float %a, i1 %c1) nounwind {
|
|
entry:
|
|
br label %for.body
|
|
|
|
for.body:
|
|
%sum.057 = phi float [ 0.000000e+00, %entry ], [ %add5, %bb0 ]
|
|
%add5 = fadd float %sum.057, %a ; PR14592
|
|
br i1 %c1, label %bb0, label %end
|
|
|
|
bb0:
|
|
br label %for.body
|
|
|
|
end:
|
|
ret float %add5
|
|
}
|
|
|
|
; CHECK-LABEL: @pr21377(
|
|
define void @pr21377(i32, i1 %c1) {
|
|
entry:
|
|
br label %while.body
|
|
|
|
while.body: ; preds = %if.end, %entry
|
|
%phi1 = phi i64 [ poison, %entry ], [ %or2, %if.end ]
|
|
%zext = zext i32 %0 to i64
|
|
br i1 %c1, label %if.end, label %if.else
|
|
|
|
if.else: ; preds = %while.body
|
|
%or1 = or i64 %phi1, %zext
|
|
%and = and i64 %or1, 4294967295
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %if.else, %while.body
|
|
%phi2 = phi i64 [ %and, %if.else ], [ poison, %while.body ]
|
|
%or2 = or i64 %phi2, %zext
|
|
br label %while.body
|
|
}
|