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[GPGPU] Create code to verify run-time conditions 

llvm-svn: 278026
This commit is contained in:
Tobias Grosser 2016-08-08 17:35:55 +00:00
parent fa9abd1f03
commit cb1aef8de4
2 changed files with 67 additions and 1 deletions
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10
polly/lib/CodeGen/PPCGCodeGeneration.cpp
View File

@ -12,6 +12,7 @@
//
//===----------------------------------------------------------------------===//
#include "polly/CodeGen/IslAst.h"
#include "polly/CodeGen/IslNodeBuilder.h"
#include "polly/CodeGen/Utils.h"
#include "polly/DependenceInfo.h"
@ -2038,10 +2039,17 @@ public:
executeScopConditionally(*S, this, Builder.getTrue());
// TODO: Handle LICM
// TODO: Verify run-time checks
auto SplitBlock = StartBlock->getSinglePredecessor();
Builder.SetInsertPoint(SplitBlock->getTerminator());
NodeBuilder.addParameters(S->getContext());
isl_ast_build *Build = isl_ast_build_alloc(S->getIslCtx());
isl_ast_expr *Condition = IslAst::buildRunCondition(S, Build);
isl_ast_build_free(Build);
Value *RTC = NodeBuilder.createRTC(Condition);
Builder.GetInsertBlock()->getTerminator()->setOperand(0, RTC);
Builder.SetInsertPoint(&*StartBlock->begin());
NodeBuilder.initializeAfterRTH();

58
polly/test/GPGPU/run-time-check.ll Normal file
View File

@ -0,0 +1,58 @@
; RUN: opt %loadPolly -polly-codegen-ppcg -S < %s | \
; RUN: FileCheck %s -check-prefix=IR
;
; REQUIRES: pollyacc
;
; void foo(long n, float A[][32]) {
; for (long i = 0; i < n; i++)
; for (long j = 0; j < n; j++)
; A[i][j] += A[i + 1][j + 1];
; }
; IR: %tmp = icmp slt i64 %i.0, %n
; IR-NEXT: br i1 %tmp, label %bb2, label %polly.merge_new_and_old
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
define void @foo(i64 %n, [32 x float]* %A) {
bb:
br label %bb1
bb1: ; preds = %bb15, %bb
%i.0 = phi i64 [ 0, %bb ], [ %tmp16, %bb15 ]
%tmp = icmp slt i64 %i.0, %n
br i1 %tmp, label %bb2, label %bb17
bb2: ; preds = %bb1
br label %bb3
bb3: ; preds = %bb12, %bb2
%j.0 = phi i64 [ 0, %bb2 ], [ %tmp13, %bb12 ]
%exitcond = icmp ne i64 %j.0, %n
br i1 %exitcond, label %bb4, label %bb14
bb4: ; preds = %bb3
%tmp5 = add nuw nsw i64 %j.0, 1
%tmp6 = add nuw nsw i64 %i.0, 1
%tmp7 = getelementptr inbounds [32 x float], [32 x float]* %A, i64 %tmp6, i64 %tmp5
%tmp8 = load float, float* %tmp7, align 4
%tmp9 = getelementptr inbounds [32 x float], [32 x float]* %A, i64 %i.0, i64 %j.0
%tmp10 = load float, float* %tmp9, align 4
%tmp11 = fadd float %tmp10, %tmp8
store float %tmp11, float* %tmp9, align 4
br label %bb12
bb12: ; preds = %bb4
%tmp13 = add nuw nsw i64 %j.0, 1
br label %bb3
bb14: ; preds = %bb3
br label %bb15
bb15: ; preds = %bb14
%tmp16 = add nuw nsw i64 %i.0, 1
br label %bb1
bb17: ; preds = %bb1
ret void
}