diff options
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/SimplifyCFG/no_speculative_loads_with_tsan.ll | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyCFG/no_speculative_loads_with_tsan.ll b/test/Transforms/SimplifyCFG/no_speculative_loads_with_tsan.ll new file mode 100644 index 0000000000..b388cc5830 --- /dev/null +++ b/test/Transforms/SimplifyCFG/no_speculative_loads_with_tsan.ll @@ -0,0 +1,40 @@ +; RUN: opt -simplifycfg -S %s | FileCheck %s +; Make sure we don't speculate loads under ThreadSanitizer. +@g = global i32 0, align 4 + +define i32 @TestNoTsan(i32 %cond) nounwind readonly uwtable { +entry: + %tobool = icmp eq i32 %cond, 0 + br i1 %tobool, label %return, label %if.then + +if.then: ; preds = %entry + %0 = load i32* @g, align 4 + br label %return + +return: ; preds = %entry, %if.then + %retval = phi i32 [ %0, %if.then ], [ 0, %entry ] + ret i32 %retval +; CHECK-LABEL: @TestNoTsan +; CHECK: %[[LOAD:[^ ]*]] = load +; CHECK: select{{.*}}[[LOAD]] +; CHECK: ret i32 +} + +define i32 @TestTsan(i32 %cond) nounwind readonly uwtable sanitize_thread { +entry: + %tobool = icmp eq i32 %cond, 0 + br i1 %tobool, label %return, label %if.then + +if.then: ; preds = %entry + %0 = load i32* @g, align 4 + br label %return + +return: ; preds = %entry, %if.then + %retval = phi i32 [ %0, %if.then ], [ 0, %entry ] + ret i32 %retval +; CHECK-LABEL: @TestTsan +; CHECK: br i1 +; CHECK: load i32* @g +; CHECK: br label +; CHECK: ret i32 +} |