mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-17 03:07:06 +00:00
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"
|
|
target triple = "powerpc64-unknown-linux-gnu"
|
|
; RUN: llc < %s | FileCheck %s
|
|
|
|
define fastcc void @allocateSpace(i1 %cond1, i1 %cond2) nounwind {
|
|
entry:
|
|
%0 = load i8** undef, align 8, !tbaa !0
|
|
br i1 undef, label %return, label %lor.lhs.false
|
|
|
|
lor.lhs.false: ; preds = %entry
|
|
br i1 undef, label %if.end7, label %return
|
|
|
|
if.end7: ; preds = %lor.lhs.false
|
|
br i1 undef, label %if.then15, label %if.end71
|
|
|
|
if.then15: ; preds = %if.end7
|
|
br label %while.cond
|
|
|
|
while.cond: ; preds = %while.body, %if.then15
|
|
%idxprom17 = sext i32 0 to i64
|
|
%arrayidx18 = getelementptr inbounds i8* %0, i64 %idxprom17
|
|
%or = or i32 undef, undef
|
|
br i1 %cond1, label %if.end71, label %while.body
|
|
|
|
while.body: ; preds = %while.cond
|
|
br i1 %cond2, label %while.cond, label %if.then45
|
|
|
|
if.then45: ; preds = %while.body
|
|
%idxprom48139 = zext i32 %or to i64
|
|
%arrayidx49 = getelementptr inbounds i8* %0, i64 %idxprom48139
|
|
%1 = bitcast i8* %arrayidx49 to i16*
|
|
%2 = bitcast i8* %arrayidx18 to i16*
|
|
%3 = load i16* %1, align 1
|
|
store i16 %3, i16* %2, align 1
|
|
br label %return
|
|
|
|
if.end71: ; preds = %while.cond, %if.end7
|
|
unreachable
|
|
|
|
return: ; preds = %if.then45, %lor.lhs.false, %entry
|
|
ret void
|
|
|
|
; CHECK: @allocateSpace
|
|
; CHECK: lbzux
|
|
}
|
|
|
|
!0 = metadata !{metadata !"any pointer", metadata !1}
|
|
!1 = metadata !{metadata !"omnipotent char", metadata !2}
|
|
!2 = metadata !{metadata !"Simple C/C++ TBAA"}
|