/
common-dest-folding.ll
57 lines (48 loc) · 1.44 KB
/
common-dest-folding.ll
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; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
;CHECK: @foo
;CHECK: and i32 %c1, %k
;CHECK: icmp eq i32
;CHECK: and i32 %c2, %k
;CHECK: icmp eq i32
;CHECK: or i1
;CHECK: ret
define i32 @foo(i32 %k, i32 %c1, i32 %c2) {
%1 = and i32 %c1, %k
%2 = icmp eq i32 %1, 0
br i1 %2, label %8, label %3
; <label>:3 ; preds = %0
%4 = and i32 %c2, %k
%5 = icmp eq i32 %4, 0
br i1 %5, label %8, label %6
; <label>:6 ; preds = %3
%7 = tail call i32 (...) @bar() nounwind
br label %8
; <label>:8 ; preds = %3, %0, %6
ret i32 undef
}
;CHECK: @conduse
;CHECK: shl i32 1, %c1
;CHECK-NEXT: shl i32 1, %c2
;CHECK-NEXT: and i32
;CHECK-NEXT: icmp eq i32
;CHECK-NEXT: and i32
;CHECK-NEXT: icmp eq i32
;CHECK: ret
define i32 @conduse(i32 %k, i32 %c1, i32 %c2) #0 {
bb:
%tmp = shl i32 1, %c1
%tmp4 = shl i32 1, %c2
%tmp1 = and i32 %tmp, %k
%tmp2 = icmp eq i32 %tmp1, 0
br i1 %tmp2, label %bb9, label %bb3
bb3: ; preds = %bb
%tmp5 = and i32 %tmp4, %k
%tmp6 = icmp eq i32 %tmp5, 0
br i1 %tmp6, label %bb9, label %bb7
bb7: ; preds = %bb3
%tmp8 = tail call i32 (...) @bar() #1
br label %bb9
bb9: ; preds = %bb7, %bb3, %bb
ret i32 undef
}
declare i32 @bar(...)