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Diffstat (limited to 'test/CodeGen/X86/nobt.ll')
| -rw-r--r-- | test/CodeGen/X86/nobt.ll | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/test/CodeGen/X86/nobt.ll b/test/CodeGen/X86/nobt.ll new file mode 100644 index 000000000000..55294280f5c8 --- /dev/null +++ b/test/CodeGen/X86/nobt.ll @@ -0,0 +1,70 @@ +; RUN: llvm-as < %s | llc -march=x86 | not grep btl + +; This tests some cases where BT must not be generated. See also bt.ll. +; Fixes 20040709-[12].c in gcc testsuite. + +define void @test2(i32 %x, i32 %n) nounwind { +entry: + %tmp1 = and i32 %x, 1 + %tmp2 = urem i32 %tmp1, 15 + %tmp3 = and i32 %tmp2, 1 ; <i32> [#uses=1] + %tmp4 = icmp eq i32 %tmp3, %tmp2 ; <i1> [#uses=1] + br i1 %tmp4, label %bb, label %UnifiedReturnBlock + +bb: ; preds = %entry + call void @foo() + ret void + +UnifiedReturnBlock: ; preds = %entry + ret void +} + +define void @test3(i32 %x, i32 %n) nounwind { +entry: + %tmp1 = and i32 %x, 1 + %tmp2 = urem i32 %tmp1, 15 + %tmp3 = and i32 %tmp2, 1 ; <i32> [#uses=1] + %tmp4 = icmp eq i32 %tmp2, %tmp3 ; <i1> [#uses=1] + br i1 %tmp4, label %bb, label %UnifiedReturnBlock + +bb: ; preds = %entry + call void @foo() + ret void + +UnifiedReturnBlock: ; preds = %entry + ret void +} + +define void @test4(i32 %x, i32 %n) nounwind { +entry: + %tmp1 = and i32 %x, 1 + %tmp2 = urem i32 %tmp1, 15 + %tmp3 = and i32 %tmp2, 1 ; <i32> [#uses=1] + %tmp4 = icmp ne i32 %tmp2, %tmp3 ; <i1> [#uses=1] + br i1 %tmp4, label %bb, label %UnifiedReturnBlock + +bb: ; preds = %entry + call void @foo() + ret void + +UnifiedReturnBlock: ; preds = %entry + ret void +} + +define void @test5(i32 %x, i32 %n) nounwind { +entry: + %tmp1 = and i32 %x, 1 + %tmp2 = urem i32 %tmp1, 15 + %tmp3 = and i32 %tmp2, 1 ; <i32> [#uses=1] + %tmp4 = icmp ne i32 %tmp2, %tmp3 ; <i1> [#uses=1] + br i1 %tmp4, label %bb, label %UnifiedReturnBlock + +bb: ; preds = %entry + call void @foo() + ret void + +UnifiedReturnBlock: ; preds = %entry + ret void +} + +declare void @foo() |