[llvm] 07bbfd9 - [Test] Add XFAIL unit test for PR50765

[Max Kazantsev via llvm-commits]

Author: Max Kazantsev
Date: 2021-06-18T16:25:42+07:00
New Revision: 07bbfd9c1368a165952e74902016739287ce2299

URL: https://github.com/llvm/llvm-project/commit/07bbfd9c1368a165952e74902016739287ce2299
DIFF: https://github.com/llvm/llvm-project/commit/07bbfd9c1368a165952e74902016739287ce2299.diff

LOG: [Test] Add XFAIL unit test for PR50765

Added: 
    llvm/test/Transforms/LoopStrengthReduce/pr50765.ll

Modified: 
    

Removed: 
    


################################################################################
diff  --git a/llvm/test/Transforms/LoopStrengthReduce/pr50765.ll b/llvm/test/Transforms/LoopStrengthReduce/pr50765.ll
new file mode 100644
index 0000000000000..0f2968388b340
--- /dev/null
+++ b/llvm/test/Transforms/LoopStrengthReduce/pr50765.ll
@@ -0,0 +1,68 @@
+; RUN: opt -S -loop-reduce < %s | FileCheck %s
+; XFAIL: *
+; REQUIRES: asserts
+;
+;This test produces zero factor that becomes a denumerator and fails an assetion.
+
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128-ni:1-p2:32:8:8:32-ni:2"
+target triple = "x86_64-unknown-linux-gnu"
+
+define void @test() {
+; CHECK-LABEL: test
+bb:
+  %tmp = load i32, i32 addrspace(3)* undef, align 4
+  br label %bb1
+
+bb1:                                              ; preds = %bb38, %bb
+  %tmp2 = phi i64 [ undef, %bb ], [ %tmp6, %bb38 ]
+  %tmp3 = phi i32 [ %tmp, %bb ], [ 1, %bb38 ]
+  %tmp4 = add i32 %tmp3, 1
+  %tmp5 = call i32 @llvm.smax.i32(i32 %tmp4, i32 74)
+  %tmp6 = add nuw nsw i64 %tmp2, 1
+  br i1 undef, label %bb7, label %bb38
+
+bb7:                                              ; preds = %bb1
+  %tmp8 = trunc i64 %tmp6 to i32
+  %tmp9 = sub nsw i32 3, %tmp5
+  %tmp10 = mul i32 %tmp9, %tmp8
+  br label %bb11
+
+bb11:                                             ; preds = %bb11, %bb7
+  %tmp12 = phi i32 [ undef, %bb7 ], [ %tmp17, %bb11 ]
+  %tmp13 = phi i64 [ 3, %bb7 ], [ %tmp22, %bb11 ]
+  %tmp14 = phi i64 [ undef, %bb7 ], [ %tmp23, %bb11 ]
+  %tmp15 = add i32 %tmp12, %tmp10
+  %tmp16 = add nuw nsw i64 %tmp13, 1
+  %tmp17 = add i32 %tmp15, %tmp10
+  %tmp18 = add i32 %tmp17, undef
+  %tmp19 = sub i32 %tmp18, undef
+  %tmp20 = sext i32 %tmp19 to i64
+  %tmp21 = add nsw i64 undef, %tmp20
+  %tmp22 = add nuw nsw i64 %tmp13, 2
+  %tmp23 = add i64 %tmp14, -2
+  %tmp24 = icmp eq i64 %tmp23, 0
+  br i1 %tmp24, label %bb25, label %bb11
+
+bb25:                                             ; preds = %bb11
+  %tmp26 = trunc i64 %tmp16 to i32
+  %tmp27 = icmp ult i32 %tmp26, 52
+  %tmp28 = trunc i64 %tmp22 to i32
+  %tmp29 = mul i32 %tmp9, %tmp28
+  %tmp30 = add i32 undef, %tmp29
+  %tmp31 = mul i32 %tmp30, %tmp8
+  %tmp32 = add i32 undef, %tmp31
+  %tmp33 = add i32 %tmp32, 34
+  %tmp34 = trunc i64 %tmp21 to i32
+  %tmp35 = add i32 %tmp33, undef
+  %tmp36 = sub i32 %tmp35, %tmp34
+  %tmp37 = sext i32 %tmp36 to i64
+  unreachable
+
+bb38:                                             ; preds = %bb1
+  br label %bb1
+}
+
+; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
+declare i32 @llvm.smax.i32(i32, i32) #0
+
+attributes #0 = { nofree nosync nounwind readnone speculatable willreturn }