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38 lines
1.4 KiB
LLVM
38 lines
1.4 KiB
LLVM
; RUN: llc -march=x86-64 < %s | FileCheck %s
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; LSR would like to use a single IV for both of these, however it's
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; not safe due to wraparound.
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; CHECK: addb $-4, %
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; CHECK: decw %
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@g_19 = common global i32 0 ; <i32*> [#uses=2]
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declare i32 @func_8(i8 zeroext) nounwind
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declare i32 @func_3(i8 signext) nounwind
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define void @func_1() nounwind {
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entry:
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br label %bb
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bb: ; preds = %bb, %entry
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%indvar = phi i16 [ 0, %entry ], [ %indvar.next, %bb ] ; <i16> [#uses=2]
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%tmp = sub i16 0, %indvar ; <i16> [#uses=1]
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%tmp27 = trunc i16 %tmp to i8 ; <i8> [#uses=1]
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%tmp1 = load i32* @g_19, align 4 ; <i32> [#uses=2]
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%tmp2 = add i32 %tmp1, 1 ; <i32> [#uses=1]
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store i32 %tmp2, i32* @g_19, align 4
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%tmp3 = trunc i32 %tmp1 to i8 ; <i8> [#uses=1]
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%tmp4 = tail call i32 @func_8(i8 zeroext %tmp3) nounwind ; <i32> [#uses=0]
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%tmp5 = shl i8 %tmp27, 2 ; <i8> [#uses=1]
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%tmp6 = add i8 %tmp5, -112 ; <i8> [#uses=1]
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%tmp7 = tail call i32 @func_3(i8 signext %tmp6) nounwind ; <i32> [#uses=0]
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%indvar.next = add i16 %indvar, 1 ; <i16> [#uses=2]
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%exitcond = icmp eq i16 %indvar.next, -28 ; <i1> [#uses=1]
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br i1 %exitcond, label %return, label %bb
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return: ; preds = %bb
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ret void
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}
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