ARM64: initial backend import

[oota-llvm.git] / test / Transforms / LoopVectorize / if-conversion.ll

diff --git a/test/Transforms/LoopVectorize/if-conversion.ll b/test/Transforms/LoopVectorize/if-conversion.ll
index 28407dce3f236863f060d977cb364cfb8af81928..dbe0243a81106a1bca17bb63a8ac24d2090e2085 100644 (file)
--- a/test/Transforms/LoopVectorize/if-conversion.ll
+++ b/test/Transforms/LoopVectorize/if-conversion.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s  -loop-vectorize -force-vector-unroll=1 -force-vector-width=4 -enable-if-conversion -dce -instcombine -licm -S | FileCheck %s
+; RUN: opt < %s  -loop-vectorize -force-vector-unroll=1 -force-vector-width=4 -enable-if-conversion -dce -instcombine -S | FileCheck %s
 
 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
 target triple = "x86_64-apple-macosx10.9.0"
@@ -17,7 +17,7 @@ target triple = "x86_64-apple-macosx10.9.0"
 ;  }
 ;}
 
-;CHECK: @function0
+;CHECK-LABEL: @function0(
 ;CHECK: load <4 x i32>
 ;CHECK: icmp sgt <4 x i32>
 ;CHECK: mul <4 x i32>
@@ -70,7 +70,7 @@ for.end:
 ;   return sum;
 ; }
 
-;CHECK: @reduction_func
+;CHECK-LABEL: @reduction_func(
 ;CHECK: load <4 x i32>
 ;CHECK: icmp sgt <4 x i32>
 ;CHECK: add <4 x i32>
@@ -106,3 +106,66 @@ for.end:                                          ; preds = %for.inc, %entry
   ret i32 %sum.0.lcssa
 }
 
+@a = common global [1 x i32*] zeroinitializer, align 8
+@c = common global i32* null, align 8
+
+; We use to if convert this loop. This is not safe because there is a trapping
+; constant expression.
+; PR16729
+
+; CHECK-LABEL: trapping_constant_expression
+; CHECK-NOT: or <4 x i32>
+
+define i32 @trapping_constant_expression() {
+entry:
+  br label %for.body
+
+for.body:
+  %inc3 = phi i32 [ 0, %entry ], [ %inc, %cond.end ]
+  %or2 = phi i32 [ 0, %entry ], [ %or, %cond.end ]
+  br i1 icmp eq (i32** getelementptr inbounds ([1 x i32*]* @a, i64 0, i64 0), i32** @c), label %cond.false, label %cond.end
+
+cond.false:
+  br label %cond.end
+
+cond.end:
+  %cond = phi i32 [ sdiv (i32 1, i32 zext (i1 icmp eq (i32** getelementptr inbounds ([1 x i32*]* @a, i64 0, i64 0), i32** @c) to i32)), %cond.false ], [ 0, %for.body ]
+  %or = or i32 %or2, %cond
+  %inc = add nsw i32 %inc3, 1
+  %cmp = icmp slt i32 %inc, 128
+  br i1 %cmp, label %for.body, label %for.end
+
+for.end:
+  ret i32 %or
+}
+
+; Neither should we if-convert if there is an instruction operand that is a
+; trapping constant expression.
+; PR16729
+
+; CHECK-LABEL: trapping_constant_expression2
+; CHECK-NOT: or <4 x i32>
+
+define i32 @trapping_constant_expression2() {
+entry:
+  br label %for.body
+
+for.body:
+  %inc3 = phi i32 [ 0, %entry ], [ %inc, %cond.end ]
+  %or2 = phi i32 [ 0, %entry ], [ %or, %cond.end ]
+  br i1 icmp eq (i32** getelementptr inbounds ([1 x i32*]* @a, i64 0, i64 0), i32** @c), label %cond.false, label %cond.end
+
+cond.false:
+  %cond.1 = or i32 %inc3, sdiv (i32 1, i32 zext (i1 icmp eq (i32** getelementptr inbounds ([1 x i32*]* @a, i64 0, i64 0), i32** @c) to i32))
+  br label %cond.end
+
+cond.end:
+  %cond = phi i32 [ %cond.1, %cond.false ], [ %inc3, %for.body ]
+  %or = or i32 %or2, %cond
+  %inc = add nsw i32 %inc3, 1
+  %cmp = icmp slt i32 %inc, 128
+  br i1 %cmp, label %for.body, label %for.end
+
+for.end:
+  ret i32 %or
+}