[polly] r245186 - Add 2nd test case for sdiv/srem instructions in a SCEV

[Tobias Grosser via llvm-commits]

Author: grosser
Date: Sun Aug 16 14:53:21 2015
New Revision: 245186

URL: http://llvm.org/viewvc/llvm-project?rev=245186&view=rev
Log:
Add 2nd test case for sdiv/srem instructions in a SCEV

Added:
    polly/trunk/test/Isl/CodeGen/inner_scev_2.ll

Added: polly/trunk/test/Isl/CodeGen/inner_scev_2.ll
URL: http://llvm.org/viewvc/llvm-project/polly/trunk/test/Isl/CodeGen/inner_scev_2.ll?rev=245186&view=auto
==============================================================================
--- polly/trunk/test/Isl/CodeGen/inner_scev_2.ll (added)
+++ polly/trunk/test/Isl/CodeGen/inner_scev_2.ll Sun Aug 16 14:53:21 2015
@@ -0,0 +1,43 @@
+; RUN: opt %loadPolly -S -polly-no-early-exit -polly-detect-unprofitable -polly-codegen < %s | FileCheck %s
+; XFAIL: *
+;
+; The SCEV expression in this test case refers to a sequence of sdiv
+; instructions, which are part of different bbs in the SCoP. When code
+; generating the parameter expressions, the code that is generated by the SCEV
+; expander has still references to the in-scop instructions, which is invalid.
+
+target triple = "x86_64-unknown-linux-gnu"
+
+define void @_vorbis_apply_window(float* %d, i64 %param) {
+entry:
+  %0 = load float*, float** undef, align 8
+  %div23.neg = sdiv i64 0, -4
+  %sub24 = add i64 0, %div23.neg
+  br label %for.cond.30.preheader
+
+for.cond.30.preheader:                            ; preds = %for.body, %entry
+  %sext = shl i64 %sub24, 32
+  %conv48.74 = ashr exact i64 %sext, 32
+  %div43 = sdiv i64 %param, 2
+  %cmp49.75 = icmp slt i64 %conv48.74, 0
+  br i1 %cmp49.75, label %for.body.51.lr.ph, label %for.cond.60.preheader
+
+for.body.51.lr.ph:                                ; preds = %for.cond.30.preheader
+  %div44 = sdiv i64 %div43, 2
+  %sub45 = add nsw i64 %div44, 4294967295
+  %1 = trunc i64 %sub45 to i32
+  %2 = sext i32 %1 to i64
+  br label %for.body.51
+
+for.cond.60.preheader:                            ; preds = %for.body.51, %for.cond.30.preheader
+  ret void
+
+for.body.51:                                      ; preds = %for.body.51, %for.body.51.lr.ph
+  %indvars.iv86 = phi i64 [ %2, %for.body.51.lr.ph ], [ undef, %for.body.51 ]
+  %arrayidx53 = getelementptr inbounds float, float* %0, i64 %indvars.iv86
+  %3 = load float, float* %arrayidx53, align 4
+  %arrayidx55 = getelementptr inbounds float, float* %d, i64 0
+  %mul56 = fmul float %3, undef
+  store float %mul56, float* %arrayidx55, align 4
+  br i1 false, label %for.body.51, label %for.cond.60.preheader
+}