Merging r259696:

[oota-llvm.git] / test / Transforms / SimplifyCFG / trapping-load-unreachable.ll

diff --git a/test/Transforms/SimplifyCFG/trapping-load-unreachable.ll b/test/Transforms/SimplifyCFG/trapping-load-unreachable.ll
index 8c856c7335ebc62f9e1a2e1975b33782403df453..5881367d96108a1311899f666b02245ce5712d7c 100644 (file)
--- a/test/Transforms/SimplifyCFG/trapping-load-unreachable.ll
+++ b/test/Transforms/SimplifyCFG/trapping-load-unreachable.ll
@@ -1,19 +1,87 @@
-; RUN: opt %s -simplifycfg | llvm-dis | grep {volatile load}
+; RUN: opt < %s -simplifycfg -S | FileCheck %s
 ; PR2967
 
 target datalayout =
 "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32"
 target triple = "i386-pc-linux-gnu"
 
-define void @foo(i32 %x) nounwind {
+define void @test1(i32 %x) nounwind {
 entry:
         %0 = icmp eq i32 %x, 0          ; <i1> [#uses=1]
         br i1 %0, label %bb, label %return
 
 bb:             ; preds = %entry
-        %1 = volatile load i32* null            ; <i32> [#uses=0]
+        %1 = load volatile i32, i32* null
         unreachable
+        
         br label %return
 return:         ; preds = %entry
         ret void
+; CHECK-LABEL: @test1(
+; CHECK: load volatile
 }
+
+; rdar://7958343
+define void @test2() nounwind {
+entry:
+        store i32 4,i32* null
+        ret void
+        
+; CHECK-LABEL: @test2(
+; CHECK: call void @llvm.trap
+; CHECK: unreachable
+}
+
+; PR7369
+define void @test3() nounwind {
+entry:
+        store volatile i32 4, i32* null
+        ret void
+
+; CHECK-LABEL: @test3(
+; CHECK: store volatile i32 4, i32* null
+; CHECK: ret
+}
+
+; Check store before unreachable.
+define void @test4(i1 %C, i32* %P) {
+; CHECK-LABEL: @test4(
+; CHECK: entry:
+; CHECK-NEXT: br i1 %C
+entry:
+  br i1 %C, label %T, label %F
+T:
+  store volatile i32 0, i32* %P
+  unreachable
+F:
+  ret void
+}
+
+; Check cmpxchg before unreachable.
+define void @test5(i1 %C, i32* %P) {
+; CHECK-LABEL: @test5(
+; CHECK: entry:
+; CHECK-NEXT: br i1 %C
+entry:
+  br i1 %C, label %T, label %F
+T:
+  cmpxchg volatile i32* %P, i32 0, i32 1 seq_cst seq_cst
+  unreachable
+F:
+  ret void
+}
+
+; Check atomicrmw before unreachable.
+define void @test6(i1 %C, i32* %P) {
+; CHECK-LABEL: @test6(
+; CHECK: entry:
+; CHECK-NEXT: br i1 %C
+entry:
+  br i1 %C, label %T, label %F
+T:
+  atomicrmw volatile xchg i32* %P, i32 0 seq_cst
+  unreachable
+F:
+  ret void
+}
+