[PATCH] D131140: [NFC][InstCombine] Add baseline tests for canonicalizing ((x + C1) & C2) --> ((x & C2) + C1) ((x + C1) ^ C2) --> ((x ^ C2) + C1) ((x + C1) | C2) --> ((x | C2) + C1) for suitable constants C1 and C2.

[Eric Gullufsen via Phabricator via llvm-commits]

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Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D131140

Files:
  llvm/test/Transforms/InstCombine/and-xor-or.ll


Index: llvm/test/Transforms/InstCombine/and-xor-or.ll
===================================================================
--- llvm/test/Transforms/InstCombine/and-xor-or.ll
+++ llvm/test/Transforms/InstCombine/and-xor-or.ll
@@ -4355,3 +4355,75 @@
   %t7 = icmp ne i32 %t6, 0
   ret i1 %t7
 }
+
+define i32 @canonicalize_logic_first_or_0(i32 %x) {
+; CHECK-LABEL: define {{[^@]+}}@canonicalize_logic_first_or_0
+; CHECK-SAME: (i32 [[X:%.*]]) {
+; CHECK-NEXT:    [[A:%.*]] = add i32 [[X]], 112
+; CHECK-NEXT:    [[R:%.*]] = or i32 [[A]], 15
+; CHECK-NEXT:    ret i32 [[R]]
+;
+  %a = add i32 %x, 112 ; 01110000
+  %r = or i32 %a, 15   ; 00001111
+  ret i32 %r
+}
+
+define i32 @canonicalize_logic_first_negative_or_0(i32 %x) {
+; CHECK-LABEL: define {{[^@]+}}@canonicalize_logic_first_negative_or_0
+; CHECK-SAME: (i32 [[X:%.*]]) {
+; CHECK-NEXT:    [[A:%.*]] = add i32 [[X]], 112
+; CHECK-NEXT:    [[R:%.*]] = or i32 [[A]], 16
+; CHECK-NEXT:    ret i32 [[R]]
+;
+  %a = add i32 %x, 112 ; 01110000
+  %r = or i32 %a, 16   ; 00010000
+  ret i32 %r
+}
+
+define i8 @canonicalize_logic_first_and_0(i8 %x) {
+; CHECK-LABEL: define {{[^@]+}}@canonicalize_logic_first_and_0
+; CHECK-SAME: (i8 [[X:%.*]]) {
+; CHECK-NEXT:    [[B:%.*]] = add i8 [[X]], 48
+; CHECK-NEXT:    [[R:%.*]] = and i8 [[B]], -10
+; CHECK-NEXT:    ret i8 [[R]]
+;
+  %b = add i8 %x, 48    ;  00110000
+  %r = and i8 %b, -10   ;  11110110
+  ret i8 %r
+}
+
+define i8 @canonicalize_logic_first_negative_and_0(i8 %x) {
+; CHECK-LABEL: define {{[^@]+}}@canonicalize_logic_first_negative_and_0
+; CHECK-SAME: (i8 [[X:%.*]]) {
+; CHECK-NEXT:    [[B:%.*]] = add i8 [[X]], 48
+; CHECK-NEXT:    [[R:%.*]] = and i8 [[B]], -26
+; CHECK-NEXT:    ret i8 [[R]]
+;
+  %b = add i8 %x, 48    ;  00110000
+  %r = and i8 %b, -26   ;  11100110
+  ret i8 %r
+}
+
+define i8 @canonicalize_logic_first_xor_0(i8 %x) {
+; CHECK-LABEL: define {{[^@]+}}@canonicalize_logic_first_xor_0
+; CHECK-SAME: (i8 [[X:%.*]]) {
+; CHECK-NEXT:    [[A:%.*]] = add i8 [[X]], 96
+; CHECK-NEXT:    [[R:%.*]] = xor i8 [[A]], 31
+; CHECK-NEXT:    ret i8 [[R]]
+;
+  %a = add i8 %x, 96  ; 01100000
+  %r = xor i8 %a, 31  ; 00011111
+  ret i8 %r
+}
+
+define i8 @canonicalize_logic_first_negative_xor_0(i8 %x) {
+; CHECK-LABEL: define {{[^@]+}}@canonicalize_logic_first_negative_xor_0
+; CHECK-SAME: (i8 [[X:%.*]]) {
+; CHECK-NEXT:    [[A:%.*]] = add i8 [[X]], 96
+; CHECK-NEXT:    [[R:%.*]] = xor i8 [[A]], 32
+; CHECK-NEXT:    ret i8 [[R]]
+;
+  %a = add i8 %x, 96  ; 01100000
+  %r = xor i8 %a, 32  ; 00100000
+  ret i8 %r
+}


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