forked from OSchip/llvm-project
50 lines
869 B
LLVM
50 lines
869 B
LLVM
; RUN: opt %loadPolly -polly-import-jscop -polly-import-jscop-postfix=transformed -polly-simplify -analyze < %s | FileCheck %s -match-full-lines
|
|
;
|
|
; Remove redundant scalar stores.
|
|
;
|
|
; for (int j = 0; j < n; j += 1) {
|
|
; bodyA:
|
|
; double val = A[0];
|
|
;
|
|
; bodyB:
|
|
; A[0] = val;
|
|
; }
|
|
;
|
|
define void @redundant_scalarwrite(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:
|
|
%val = load double, double* %A
|
|
br label %bodyB
|
|
|
|
bodyB:
|
|
store double %val, 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: 2
|
|
; CHECK: }
|
|
|
|
; CHECK: After accesses {
|
|
; CHECK-NEXT: }
|