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Diffstat (limited to 'test/CodeGen/X86/lsr-wrap.ll')
-rw-r--r-- | test/CodeGen/X86/lsr-wrap.ll | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/test/CodeGen/X86/lsr-wrap.ll b/test/CodeGen/X86/lsr-wrap.ll new file mode 100644 index 0000000000..ec8db501ef --- /dev/null +++ b/test/CodeGen/X86/lsr-wrap.ll @@ -0,0 +1,37 @@ +; RUN: llc -march=x86-64 < %s | FileCheck %s + +; LSR would like to use a single IV for both of these, however it's +; not safe due to wraparound. + +; CHECK: addb $-4, %r +; CHECK: decw % + +@g_19 = common global i32 0 ; <i32*> [#uses=2] + +declare i32 @func_8(i8 zeroext) nounwind + +declare i32 @func_3(i8 signext) nounwind + +define void @func_1() nounwind { +entry: + br label %bb + +bb: ; preds = %bb, %entry + %indvar = phi i16 [ 0, %entry ], [ %indvar.next, %bb ] ; <i16> [#uses=2] + %tmp = sub i16 0, %indvar ; <i16> [#uses=1] + %tmp27 = trunc i16 %tmp to i8 ; <i8> [#uses=1] + %tmp1 = load i32* @g_19, align 4 ; <i32> [#uses=2] + %tmp2 = add i32 %tmp1, 1 ; <i32> [#uses=1] + store i32 %tmp2, i32* @g_19, align 4 + %tmp3 = trunc i32 %tmp1 to i8 ; <i8> [#uses=1] + %tmp4 = tail call i32 @func_8(i8 zeroext %tmp3) nounwind ; <i32> [#uses=0] + %tmp5 = shl i8 %tmp27, 2 ; <i8> [#uses=1] + %tmp6 = add i8 %tmp5, -112 ; <i8> [#uses=1] + %tmp7 = tail call i32 @func_3(i8 signext %tmp6) nounwind ; <i32> [#uses=0] + %indvar.next = add i16 %indvar, 1 ; <i16> [#uses=2] + %exitcond = icmp eq i16 %indvar.next, -28 ; <i1> [#uses=1] + br i1 %exitcond, label %return, label %bb + +return: ; preds = %bb + ret void +} |