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a26a8471bd
pass after isel instead of being interlaced with it, we can trust that all the code for a function has been isel'd before it is run. The practical impact of this is that we can scan for machine instr phis instead of doing a fuzzy match on the LLVM BB for phi nodes. Doing the fuzzy match required knowing when isel would produce an fp reg stack phi which was gross. It was also wrong in cases where select got lowered to a branch tree because cmovs aren't available (PR6828). Just do the scan on machine phis which is simpler, faster and more correct. This fixes PR6828. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104333 91177308-0d34-0410-b5e6-96231b3b80d8
26 lines
1.0 KiB
LLVM
26 lines
1.0 KiB
LLVM
; RUN: llc %s -o - -mcpu=pentium
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; PR6828
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"
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target triple = "i386-pc-linux-gnu"
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define void @foo() nounwind {
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entry:
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%tmp6 = load x86_fp80* undef ; <x86_fp80> [#uses=2]
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%tmp15 = load x86_fp80* undef ; <x86_fp80> [#uses=2]
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%tmp24 = load x86_fp80* undef ; <x86_fp80> [#uses=1]
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br i1 undef, label %return, label %bb.nph
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bb.nph: ; preds = %entry
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%cmp139 = fcmp ogt x86_fp80 %tmp15, %tmp6 ; <i1> [#uses=1]
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%maxdiag.0 = select i1 %cmp139, x86_fp80 %tmp15, x86_fp80 %tmp6 ; <x86_fp80> [#uses=1]
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%cmp139.1 = fcmp ogt x86_fp80 %tmp24, %maxdiag.0 ; <i1> [#uses=1]
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br i1 %cmp139.1, label %sw.bb372, label %return
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sw.bb372: ; preds = %for.end
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ret void
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return: ; preds = %for.end
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ret void
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}
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