7b3fe5fd42
Split off from PR #163525, this standalone patch replaces simple cases where undef is used as a value for arithmetic or getelementptr instructions. This will reduce the likelihood of contributors hitting the `undef deprecator` warning in github.
31 lines
1.2 KiB
LLVM
31 lines
1.2 KiB
LLVM
; RUN: opt < %s -passes=loop-vectorize -force-vector-width=4 -S | FileCheck %s
|
|
|
|
; Out of the LCSSA form we could have 'phi i32 [ loop-invariant, %for.inc.2.i ]'
|
|
; but the IR Verifier requires for PHI one entry for each predecessor of
|
|
; it's parent basic block. The original PR14725 solution for the issue just
|
|
; added 'undef' for an predecessor BB and which is not correct. We copy the real
|
|
; value for another predecessor instead of bringing 'undef'.
|
|
|
|
; CHECK-LABEL: for.cond.preheader:
|
|
; CHECK: %e.0.ph = phi i32 [ 0, %if.end.2.i ], [ 0, %middle.block ]
|
|
|
|
; Function Attrs: nounwind uwtable
|
|
define void @main(i32 %n, i32 %v) #0 {
|
|
entry:
|
|
br label %for.cond1.preheader.i
|
|
|
|
for.cond1.preheader.i: ; preds = %if.end.2.i, %entry
|
|
%c.06.i = phi i32 [ 0, %entry ], [ %inc5.i, %if.end.2.i ]
|
|
%tobool.i = icmp ne i32 %v, 0
|
|
br label %if.end.2.i
|
|
|
|
if.end.2.i: ; preds = %for.cond1.preheader.i
|
|
%inc5.i = add nsw i32 %c.06.i, 1
|
|
%cmp.i = icmp slt i32 %inc5.i, %n
|
|
br i1 %cmp.i, label %for.cond1.preheader.i, label %for.cond.preheader
|
|
|
|
for.cond.preheader: ; preds = %if.end.2.i
|
|
%e.0.ph = phi i32 [ 0, %if.end.2.i ]
|
|
unreachable
|
|
}
|