forward_hoisted.ll
1.86 KB
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; RUN: opt %loadPolly -polly-invariant-load-hoisting=true -polly-optree -analyze < %s | FileCheck %s -match-full-lines
;
; Move %val to %bodyB, so %bodyA can be removed (by -polly-simplify).
; This involves making the load-hoisted %val1 to be made available in %bodyB.
;
; for (int j = 0; j < n; j += 1) {
; bodyA:
; double val = B[0] + 21.0;
;
; bodyB:
; A[0] = val;
; }
;
define void @func(i32 %n, double* noalias nonnull %A, double* noalias nonnull %B) {
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* %B
%val2 = fadd double %val1, 21.0
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: Instructions copied: 1
; CHECK: Operand trees forwarded: 1
; CHECK: Statements with forwarded operand trees: 1
; CHECK: }
; CHECK: After statements {
; CHECK-NEXT: Stmt_bodyA
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: [n] -> { Stmt_bodyA[i0] -> MemRef_val2[] };
; CHECK-NEXT: Instructions {
; CHECK-NEXT: %val1 = load double, double* %B, align 8
; CHECK-NEXT: %val2 = fadd double %val1, 2.100000e+01
; CHECK-NEXT: }
; CHECK-NEXT: Stmt_bodyB
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: [n] -> { Stmt_bodyB[i0] -> MemRef_A[0] };
; CHECK-NEXT: Instructions {
; CHECK-NEXT: %val2 = fadd double %val1, 2.100000e+01
; CHECK-NEXT: store double %val2, double* %A, align 8
; CHECK-NEXT: }
; CHECK-NEXT: }