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TheRock/compiler/amd-llvm/llvm/test/Transforms/LICM/2007-09-24-PromoteNullValue.ll
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derek.holloway 7502bf64a4
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2026-09-02 16:34:47 -07:00

47 lines
1.0 KiB
LLVM

; Do not promote null value because it may be unsafe to do so.
; RUN: opt < %s -passes=licm -S | not grep promoted
define i32 @f(i32 %foo, i32 %bar, i32 %com) {
entry:
%tmp2 = icmp eq i32 %foo, 0 ; <i1> [#uses=1]
br i1 %tmp2, label %cond_next, label %cond_true
cond_true: ; preds = %entry
br label %return
cond_next: ; preds = %entry
br label %bb
bb: ; preds = %bb15, %cond_next
switch i32 %bar, label %bb15 [
i32 1, label %bb6
]
bb6: ; preds = %bb
%tmp8 = icmp eq i32 %com, 0 ; <i1> [#uses=1]
br i1 %tmp8, label %cond_next14, label %cond_true11
cond_true11: ; preds = %bb6
br label %return
cond_next14: ; preds = %bb6
store i8 0, ptr null
br label %bb15
bb15: ; preds = %cond_next14, %bb
br label %bb
return: ; preds = %cond_true11, %cond_true
%storemerge = phi i32 [ 0, %cond_true ], [ undef, %cond_true11 ] ; <i32> [#uses=1]
ret i32 %storemerge
}
define i32 @kdMain() {
entry:
%tmp1 = call i32 @f( i32 0, i32 1, i32 1 ) ; <i32> [#uses=0]
call void @exit( i32 0 )
unreachable
}
declare void @exit(i32)