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llvm-mirror/test/Transforms/InstCombine/zext-bool-add-sub.ll
Paul Redmond 3d611dcda9 Transform (sub 0, (zext bool to A)) to (sext bool to A) and
(sub 0, (sext bool to A)) to (zext bool to A).

Patch by Muhammad Ahmad
Reviewed by Duncan Sands

llvm-svn: 173093
2013-01-21 21:57:20 +00:00

17 lines
432 B
LLVM

; RUN: opt < %s -instcombine -S | FileCheck %s
; rdar://11748024
define i32 @a(i1 zeroext %x, i1 zeroext %y) {
entry:
; CHECK: @a
; CHECK: [[TMP1:%.*]] = sext i1 %y to i32
; CHECK: [[TMP2:%.*]] = select i1 %x, i32 2, i32 1
; CHECK-NEXT: add i32 [[TMP2]], [[TMP1]]
%conv = zext i1 %x to i32
%conv3 = zext i1 %y to i32
%conv3.neg = sub i32 0, %conv3
%sub = add i32 %conv, 1
%add = add i32 %sub, %conv3.neg
ret i32 %add
}