redundant_region_scalar.ll
1.06 KB
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; RUN: opt %loadPolly -polly-import-jscop -polly-import-jscop-postfix=transformed -polly-simplify -analyze < %s | FileCheck %s -match-full-lines
;
; Remove redundant store (a store that writes the same value already
; at the destination) in a region.
;
define void @redundant_region_scalar(i32 %n, double* noalias nonnull %A) {
entry:
br label %for
for:
%j = phi i32 [0, %entry], [%j.inc, %inc]
%j.cmp = icmp slt i32 %j, %n
br i1 %j.cmp, label %bodyA, label %exit
bodyA:
%val1 = load double, double* %A
br label %region_entry
region_entry:
%val2 = load double, double* %A
%cmp = fcmp oeq double %val1, 0.0
br i1 %cmp, label %region_true, label %region_exit
region_true:
br label %region_exit
region_exit:
br label %bodyB
bodyB:
store double %val2, double* %A
br label %inc
inc:
%j.inc = add nuw nsw i32 %j, 1
br label %for
exit:
br label %return
return:
ret void
}
; CHECK: Statistics {
; CHECK: Redundant writes removed: 3
; CHECK: }
; CHECK: After accesses {
; CHECK-NEXT: }