1 files changed, 80 insertions, 0 deletions
diff --git a/test/Transforms/SLPVectorizer/X86/value-bug.ll b/test/Transforms/SLPVectorizer/X86/value-bug.ll
new file mode 100644
index 0000000..64d2ae1
--- /dev/null
+++ b/test/Transforms/SLPVectorizer/X86/value-bug.ll
@@ -0,0 +1,80 @@
+; RUN: opt -slp-vectorizer < %s -S -mtriple="x86_64-grtev3-linux-gnu" -mcpu=corei7-avx | FileCheck %s
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-grtev3-linux-gnu"
+
+; We used to crash on this example because we were building a constant
+; expression during vectorization and the vectorizer expects instructions
+; as elements of the vectorized tree.
+; CHECK-LABEL: @test
+; PR19621
+
+define void @test() {
+bb279:
+  br label %bb283
+
+bb283:
+  %Av.sroa.8.0 = phi float [ undef, %bb279 ], [ %tmp315, %exit ]
+  %Av.sroa.5.0 = phi float [ undef, %bb279 ], [ %tmp319, %exit ]
+  %Av.sroa.3.0 = phi float [ undef, %bb279 ], [ %tmp307, %exit ]
+  %Av.sroa.0.0 = phi float [ undef, %bb279 ], [ %tmp317, %exit ]
+  br label %bb284
+
+bb284:
+  %tmp7.i = fpext float %Av.sroa.3.0 to double
+  %tmp8.i = fsub double %tmp7.i, undef
+  %tmp9.i = fsub double %tmp8.i, undef
+  %tmp17.i = fpext float %Av.sroa.8.0 to double
+  %tmp19.i = fsub double %tmp17.i, undef
+  %tmp20.i = fsub double %tmp19.i, undef
+  br label %bb21.i
+
+bb21.i:
+  br i1 undef, label %bb22.i, label %exit
+
+bb22.i:
+  %tmp24.i = fadd double undef, %tmp9.i
+  %tmp26.i = fadd double undef, %tmp20.i
+  br label %bb32.i
+
+bb32.i:
+  %xs.0.i = phi double [ %tmp24.i, %bb22.i ], [ 0.000000e+00, %bb32.i ]
+  %ys.0.i = phi double [ %tmp26.i, %bb22.i ], [ 0.000000e+00, %bb32.i ]
+  br i1 undef, label %bb32.i, label %bb21.i
+
+exit:
+  %tmp303 = fpext float %Av.sroa.0.0 to double
+  %tmp304 = fmul double %tmp303, undef
+  %tmp305 = fadd double undef, %tmp304
+  %tmp306 = fadd double %tmp305, undef
+  %tmp307 = fptrunc double %tmp306 to float
+  %tmp311 = fpext float %Av.sroa.5.0 to double
+  %tmp312 = fmul double %tmp311, 0.000000e+00
+  %tmp313 = fadd double undef, %tmp312
+  %tmp314 = fadd double %tmp313, undef
+  %tmp315 = fptrunc double %tmp314 to float
+  %tmp317 = fptrunc double undef to float
+  %tmp319 = fptrunc double undef to float
+  br label %bb283
+}
+
+; Make sure that we probably handle constant folded vectorized trees. The
+; vectorizer starts at the type (%t2, %t3) and wil constant fold the tree.
+; The code that handles insertelement instructions must handle this.
+define <4 x double> @constant_folding() {
+entry:
+  %t0 = fadd double 1.000000e+00 , 0.000000e+00
+  %t1 = fadd double 1.000000e+00 , 1.000000e+00
+  %t2 = fmul double %t0, 1.000000e+00
+  %i1 = insertelement <4 x double> undef, double %t2, i32 1
+  %t3 = fmul double %t1, 1.000000e+00
+  %i2 = insertelement <4 x double> %i1, double %t3, i32 0
+  ret <4 x double> %i2
+}
+
+; CHECK-LABEL: @constant_folding
+; CHECK: %[[V0:.+]] = extractelement <2 x double> <double 1.000000e+00, double 2.000000e+00>, i32 0
+; CHECK: %[[V1:.+]] = insertelement <4 x double> undef, double %[[V0]], i32 1
+; CHECK: %[[V2:.+]] = extractelement <2 x double> <double 1.000000e+00, double 2.000000e+00>, i32 1
+; CHECK: %[[V3:.+]] = insertelement <4 x double> %[[V1]], double %[[V2]], i32 0
+; CHECK: ret <4 x double> %[[V3]]