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[DeLICM] Regression test for skipping map targets. 

Add optimization-remarks-missed for when mapping targets have been
skipped and add regression tests for them.

llvm-svn: 295953
This commit is contained in:
Michael Kruse 2017-02-23 10:25:20 +00:00
parent c7ce4fef20
commit d8d32bb3d1
4 changed files with 197 additions and 0 deletions
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14
polly/lib/Transform/DeLICM.cpp
View File

@ -1607,18 +1607,32 @@ public:
if (MA->isMayWrite()) {
DEBUG(dbgs() << "Access " << MA
<< " pruned because it is a MAY_WRITE\n");
OptimizationRemarkMissed R(DEBUG_TYPE, "TargetMayWrite",
MA->getAccessInstruction());
R << "Skipped possible mapping target because it is not an "
"unconditional overwrite";
S->getFunction().getContext().diagnose(R);
continue;
}
if (Stmt.getNumIterators() == 0) {
DEBUG(dbgs() << "Access " << MA
<< " pruned because it is not in a loop\n");
OptimizationRemarkMissed R(DEBUG_TYPE, "WriteNotInLoop",
MA->getAccessInstruction());
R << "skipped possible mapping target because it is not in a loop";
S->getFunction().getContext().diagnose(R);
continue;
}
if (isScalarAccess(MA)) {
DEBUG(dbgs() << "Access " << MA
<< " pruned because it writes only a single element\n");
OptimizationRemarkMissed R(DEBUG_TYPE, "ScalarWrite",
MA->getAccessInstruction());
R << "skipped possible mapping target because the memory location "
"written to does not depend on its outer loop";
S->getFunction().getContext().diagnose(R);
continue;
}

74
polly/test/DeLICM/skip_maywrite.ll Normal file
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@ -0,0 +1,74 @@
; RUN: opt %loadPolly -polly-delicm -analyze -pass-remarks-missed=polly-delicm < %s 2>&1 | FileCheck %s
;
; void func(double *A) {
; for (int j = 0; j < 2; j += 1) { /* outer */
; memset(A[j], 0, sizeof(double));
; double phi = 0.0;
; for (int i = 0; i < 4; i += 1) /* reduction */
; phi += 4.2;
; if (phi >= 0.0)
; A[j] = phi;
; }
; }
;
define void @func(double* noalias nonnull %A) {
entry:
br label %outer.preheader
outer.preheader:
br label %outer.for
outer.for:
%j = phi i32 [0, %outer.preheader], [%j.inc, %outer.inc]
%j.cmp = icmp slt i32 %j, 2
br i1 %j.cmp, label %reduction.preheader, label %outer.exit
reduction.preheader:
br label %reduction.for
reduction.for:
%i = phi i32 [0, %reduction.preheader], [%i.inc, %reduction.inc]
%phi = phi double [0.0, %reduction.preheader], [%add, %reduction.inc]
%i.cmp = icmp slt i32 %i, 4
br i1 %i.cmp, label %body, label %reduction.exit
body:
%add = fadd double %phi, 4.2
br label %reduction.inc
reduction.inc:
%i.inc = add nuw nsw i32 %i, 1
br label %reduction.for
reduction.exit:
%phi.cmp = fcmp ogt double %phi, 0.0
br i1 %phi.cmp , label %reduction.exit_true, label %reduction.exit_false
reduction.exit_true:
%A_idx = getelementptr inbounds double, double* %A, i32 %j
store double %phi, double* %A_idx
br label %outer.inc
reduction.exit_false:
br label %outer.inc
outer.inc:
%j.inc = add nuw nsw i32 %j, 1
br label %outer.for
outer.exit:
br label %return
return:
ret void
}
; CHECK: Skipped possible mapping target because it is not an unconditional overwrite

45
polly/test/DeLICM/skip_notinloop.ll Normal file
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@ -0,0 +1,45 @@
; RUN: opt %loadPolly -polly-delicm -analyze -pass-remarks-missed=polly-delicm < %s 2>&1 | FileCheck %s
;
; void func(double *A) {
; double phi = 0.0;
; for (int i = 0; i < 4; i += 1) /* reduction */
; phi += 4.2;
; A[0] = phi;
; }
;
define void @func(double* noalias nonnull %A) {
entry:
br label %reduction.preheader
reduction.preheader:
br label %reduction.for
reduction.for:
%i = phi i32 [0, %reduction.preheader], [%i.inc, %reduction.inc]
%phi = phi double [0.0, %reduction.preheader], [%add, %reduction.inc]
%i.cmp = icmp slt i32 %i, 4
br i1 %i.cmp, label %body, label %reduction.exit
body:
%add = fadd double %phi, 4.2
br label %reduction.inc
reduction.inc:
%i.inc = add nuw nsw i32 %i, 1
br label %reduction.for
reduction.exit:
store double %phi, double* %A
br label %return
return:
ret void
}
; CHECK: skipped possible mapping target because it is not in a loop

64
polly/test/DeLICM/skip_scalaraccess.ll Normal file
View File

@ -0,0 +1,64 @@
; RUN: opt %loadPolly -polly-delicm -analyze -pass-remarks-missed=polly-delicm < %s 2>&1 | FileCheck %s
;
; void func(double *A) {
; for (int j = 0; j < 2; j += 1) { /* outer */
; double phi = 0.0;
; for (int i = 0; i < 4; i += 1) /* reduction */
; phi += 4.2;
; A[0] = phi;
; }
; }
;
define void @func(double* noalias nonnull %A) {
entry:
br label %outer.preheader
outer.preheader:
br label %outer.for
outer.for:
%j = phi i32 [0, %outer.preheader], [%j.inc, %outer.inc]
%j.cmp = icmp slt i32 %j, 2
br i1 %j.cmp, label %reduction.preheader, label %outer.exit
reduction.preheader:
br label %reduction.for
reduction.for:
%i = phi i32 [0, %reduction.preheader], [%i.inc, %reduction.inc]
%phi = phi double [0.0, %reduction.preheader], [%add, %reduction.inc]
%i.cmp = icmp slt i32 %i, 4
br i1 %i.cmp, label %body, label %reduction.exit
body:
%add = fadd double %phi, 4.2
br label %reduction.inc
reduction.inc:
%i.inc = add nuw nsw i32 %i, 1
br label %reduction.for
reduction.exit:
store double %phi, double* %A
br label %outer.inc
outer.inc:
%j.inc = add nuw nsw i32 %j, 1
br label %outer.for
outer.exit:
br label %return
return:
ret void
}
; CHECK: skipped possible mapping target because the memory location written to does not depend on its outer loop