mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 15:11:24 +00:00
cd6636c737
offload the work to hasConstantValue rather than do something more complicated (such handling mutually recursive phis) because (1) it is not clear it is worth it; and (2) if it is worth it, maybe such logic would be better placed in hasConstantValue. Adjust some GVN tests which are now cleaned up much further (eg: all phi nodes are removed). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119043 91177308-0d34-0410-b5e6-96231b3b80d8
43 lines
1.2 KiB
LLVM
43 lines
1.2 KiB
LLVM
; RUN: opt < %s -basicaa -gvn -S | FileCheck %s
|
|
|
|
; CHECK-NOT: load
|
|
; CHECK-NOT: phi
|
|
|
|
define i8* @cat(i8* %s1, ...) nounwind {
|
|
entry:
|
|
br i1 undef, label %bb, label %bb3
|
|
|
|
bb: ; preds = %entry
|
|
unreachable
|
|
|
|
bb3: ; preds = %entry
|
|
store i8* undef, i8** undef, align 4
|
|
br i1 undef, label %bb5, label %bb6
|
|
|
|
bb5: ; preds = %bb3
|
|
unreachable
|
|
|
|
bb6: ; preds = %bb3
|
|
br label %bb12
|
|
|
|
bb8: ; preds = %bb12
|
|
br i1 undef, label %bb9, label %bb10
|
|
|
|
bb9: ; preds = %bb8
|
|
%0 = load i8** undef, align 4 ; <i8*> [#uses=0]
|
|
%1 = load i8** undef, align 4 ; <i8*> [#uses=0]
|
|
br label %bb11
|
|
|
|
bb10: ; preds = %bb8
|
|
br label %bb11
|
|
|
|
bb11: ; preds = %bb10, %bb9
|
|
br label %bb12
|
|
|
|
bb12: ; preds = %bb11, %bb6
|
|
br i1 undef, label %bb8, label %bb13
|
|
|
|
bb13: ; preds = %bb12
|
|
ret i8* undef
|
|
}
|