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3cfe01072c
These instructions technically define AL,AH, but a trick in X86ISelDAGToDAG reads AX in order to avoid reading AH with a REX instruction. Fix PR6489. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97742 91177308-0d34-0410-b5e6-96231b3b80d8
26 lines
1.1 KiB
LLVM
26 lines
1.1 KiB
LLVM
; RUN: llc < %s
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; PR6489
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;
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; This test case produces a MUL8 instruction and then tries to read the result
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; from the AX register instead of AH/AL. That confuses live interval analysis.
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;
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-apple-darwin10.0.0"
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define void @func_56(i64 %p_57, i32*** %p_58) nounwind ssp {
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for.end:
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%conv49 = trunc i32 undef to i8 ; <i8> [#uses=1]
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%div.i = udiv i8 %conv49, 5 ; <i8> [#uses=1]
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%conv51 = zext i8 %div.i to i32 ; <i32> [#uses=1]
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%call55 = call i32 @qux(i32 undef, i32 -2) nounwind ; <i32> [#uses=1]
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%rem.i = urem i32 %call55, -1 ; <i32> [#uses=1]
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%cmp57 = icmp uge i32 %conv51, %rem.i ; <i1> [#uses=1]
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%conv58 = zext i1 %cmp57 to i32 ; <i32> [#uses=1]
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%call85 = call i32 @func_35(i32*** undef, i32 undef, i32 %conv58, i32 1247, i32 0) nounwind ; <i32> [#uses=0]
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ret void
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}
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declare i32 @func_35(i32***, i32, i32, i32, i32)
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declare i32 @qux(i32, i32)
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