mirror of
https://github.com/c64scene-ar/llvm-6502.git
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3e883734fa
and allow some optimizations to turn conditional branches into unconditional. This commit adds a simple control-flow optimization which merges two consecutive basic blocks which are connected by a single edge. This allows the codegen to operate on larger basic blocks. rdar://11973998 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161852 91177308-0d34-0410-b5e6-96231b3b80d8
50 lines
1.8 KiB
LLVM
50 lines
1.8 KiB
LLVM
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-v128:128:128-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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; RUN: llc < %s | FileCheck %s
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define fastcc void @allocateSpace(i1 %cond1, i1 %cond2) nounwind {
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entry:
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%0 = load i8** undef, align 8, !tbaa !0
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br i1 undef, label %return, label %lor.lhs.false
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lor.lhs.false: ; preds = %entry
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br i1 undef, label %if.end7, label %return
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if.end7: ; preds = %lor.lhs.false
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br i1 undef, label %if.then15, label %if.end71
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if.then15: ; preds = %if.end7
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br label %while.cond
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while.cond: ; preds = %while.body, %if.then15
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%idxprom17 = sext i32 0 to i64
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%arrayidx18 = getelementptr inbounds i8* %0, i64 %idxprom17
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%or = or i32 undef, undef
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br i1 %cond1, label %if.end71, label %while.body
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while.body: ; preds = %while.cond
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br i1 %cond2, label %while.cond, label %if.then45
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if.then45: ; preds = %while.body
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%idxprom48139 = zext i32 %or to i64
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%arrayidx49 = getelementptr inbounds i8* %0, i64 %idxprom48139
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%1 = bitcast i8* %arrayidx49 to i16*
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%2 = bitcast i8* %arrayidx18 to i16*
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%3 = load i16* %1, align 1
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store i16 %3, i16* %2, align 1
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br label %return
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if.end71: ; preds = %while.cond, %if.end7
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unreachable
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return: ; preds = %if.then45, %lor.lhs.false, %entry
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ret void
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; CHECK: @allocateSpace
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; CHECK: lbzux
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}
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!0 = metadata !{metadata !"any pointer", metadata !1}
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!1 = metadata !{metadata !"omnipotent char", metadata !2}
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!2 = metadata !{metadata !"Simple C/C++ TBAA"}
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