[llvm] ba9c6ad - [NFC][InstCombine] Add tests for sinking `not` into logical ops with hands with extra (but invertible) uses
Roman Lebedev via llvm-commits
llvm-commits at lists.llvm.org
Sun Dec 18 17:11:39 PST 2022
Author: Roman Lebedev
Date: 2022-12-19T04:11:15+03:00
New Revision: ba9c6add4c9d9027871f93886ad999fce8db2f70
URL: https://github.com/llvm/llvm-project/commit/ba9c6add4c9d9027871f93886ad999fce8db2f70
DIFF: https://github.com/llvm/llvm-project/commit/ba9c6add4c9d9027871f93886ad999fce8db2f70.diff
LOG: [NFC][InstCombine] Add tests for sinking `not` into logical ops with hands with extra (but invertible) uses
Added:
llvm/test/Transforms/InstCombine/sink-not-into-and.ll
llvm/test/Transforms/InstCombine/sink-not-into-logical-and.ll
llvm/test/Transforms/InstCombine/sink-not-into-logical-or.ll
llvm/test/Transforms/InstCombine/sink-not-into-or.ll
Modified:
Removed:
################################################################################
diff --git a/llvm/test/Transforms/InstCombine/sink-not-into-and.ll b/llvm/test/Transforms/InstCombine/sink-not-into-and.ll
new file mode 100644
index 0000000000000..b77e09ca3a666
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/sink-not-into-and.ll
@@ -0,0 +1,215 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
+
+; Transform
+; z = ~(x & y)
+; into:
+; z = ~(~x | ~y)
+; iff both x and y are free to invert.
+
+declare void @use1(i1)
+
+; Most basic positive test
+define i1 @t0(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @t0(
+; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp ne i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I4:%.*]] = or i1 [[I2]], [[I1]]
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = and i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; All operands must be invertible
+define i1 @n1(i1 %i1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n1(
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = and i1 [[I2]], [[I1:%.*]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = and i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @n2(i32 %v0, i32 %v1, i1 %i2) {
+; CHECK-LABEL: @n2(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = and i1 [[I1]], [[I2:%.*]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i3 = and i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @n3(i1 %i1, i1 %i2) {
+; CHECK-LABEL: @n3(
+; CHECK-NEXT: [[I3:%.*]] = and i1 [[I2:%.*]], [[I1:%.*]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i3 = and i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; All other uses of operands must be invertible
+define i1 @n4(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n4(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I1]])
+; CHECK-NEXT: [[I3:%.*]] = and i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ call void @use1(i1 %i1)
+ %i3 = and i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @n5(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n5(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I2]])
+; CHECK-NEXT: [[I3:%.*]] = and i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ call void @use1(i1 %i2)
+ %i3 = and i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @n6(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n6(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I1]])
+; CHECK-NEXT: call void @use1(i1 [[I2]])
+; CHECK-NEXT: [[I3:%.*]] = and i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ call void @use1(i1 %i1)
+ call void @use1(i1 %i2)
+ %i3 = and i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; Hands have invertible uses
+define i1 @t7(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @t7(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I1_NOT:%.*]] = xor i1 [[I1]], true
+; CHECK-NEXT: call void @use1(i1 [[I1_NOT]])
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = and i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i1.not = xor i1 %i1, -1
+ call void @use1(i1 %i1.not)
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = and i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @t8(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @t8(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I2_NOT:%.*]] = xor i1 [[I2]], true
+; CHECK-NEXT: call void @use1(i1 [[I2_NOT]])
+; CHECK-NEXT: [[I3:%.*]] = and i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ %i2.not = xor i1 %i2, -1
+ call void @use1(i1 %i2.not)
+ %i3 = and i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @t9(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @t9(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I1_NOT:%.*]] = xor i1 [[I1]], true
+; CHECK-NEXT: call void @use1(i1 [[I1_NOT]])
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I2_NOT:%.*]] = xor i1 [[I2]], true
+; CHECK-NEXT: call void @use1(i1 [[I2_NOT]])
+; CHECK-NEXT: [[I3:%.*]] = and i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i1.not = xor i1 %i1, -1
+ call void @use1(i1 %i1.not)
+ %i2 = icmp eq i32 %v2, %v3
+ %i2.not = xor i1 %i2, -1
+ call void @use1(i1 %i2.not)
+ %i3 = and i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; Select can have other uses
+
+; Not all uses can be adapted
+define i1 @n10(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n10(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = and i1 [[I2]], [[I1]]
+; CHECK-NEXT: call void @use1(i1 [[I3]])
+; CHECK-NEXT: [[I4_DEMORGAN:%.*]] = and i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I4_DEMORGAN]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = and i1 %i2, %i1
+ call void @use1(i1 %i3)
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; All other uses can be adapted.
+define i1 @t11(i32 %v0, i32 %v1, i32 %v2, i32 %v3, i1 %v4, i1 %v5) {
+; CHECK-LABEL: @t11(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = and i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4_DEMORGAN:%.*]] = and i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I4_DEMORGAN]], true
+; CHECK-NEXT: [[I5:%.*]] = select i1 [[I3]], i1 [[V4:%.*]], i1 [[V5:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I5]])
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = and i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ %i5 = select i1 %i3, i1 %v4, i1 %v5
+ call void @use1(i1 %i5)
+ ret i1 %i4
+}
diff --git a/llvm/test/Transforms/InstCombine/sink-not-into-logical-and.ll b/llvm/test/Transforms/InstCombine/sink-not-into-logical-and.ll
new file mode 100644
index 0000000000000..496b9cdc0873b
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/sink-not-into-logical-and.ll
@@ -0,0 +1,211 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
+
+; Transform
+; z = ~(x & y)
+; into:
+; z = ~(~x | ~y)
+; iff both x and y are free to invert.
+
+declare void @use1(i1)
+
+; Most basic positive test
+define i1 @t0(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @t0(
+; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp ne i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 true, i1 [[I1]]
+; CHECK-NEXT: ret i1 [[I3]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = select i1 %i2, i1 %i1, i1 false
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; All operands must be invertible
+define i1 @n1(i1 %i1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n1(
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 [[I1:%.*]], i1 false
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = select i1 %i2, i1 %i1, i1 false
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @n2(i32 %v0, i32 %v1, i1 %i2) {
+; CHECK-LABEL: @n2(
+; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[NOT_I2:%.*]] = xor i1 [[I2:%.*]], true
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[NOT_I2]], i1 true, i1 [[I1]]
+; CHECK-NEXT: ret i1 [[I3]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i3 = select i1 %i2, i1 %i1, i1 false
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @n3(i1 %i1, i1 %i2) {
+; CHECK-LABEL: @n3(
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2:%.*]], i1 [[I1:%.*]], i1 false
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i3 = select i1 %i2, i1 %i1, i1 false
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; All other uses of operands must be invertible
+define i1 @n4(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n4(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I1]])
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 [[I1]], i1 false
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ call void @use1(i1 %i1)
+ %i3 = select i1 %i2, i1 %i1, i1 false
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @n5(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n5(
+; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I2]])
+; CHECK-NEXT: [[NOT_I2:%.*]] = xor i1 [[I2]], true
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[NOT_I2]], i1 true, i1 [[I1]]
+; CHECK-NEXT: ret i1 [[I3]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ call void @use1(i1 %i2)
+ %i3 = select i1 %i2, i1 %i1, i1 false
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @n6(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n6(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I1]])
+; CHECK-NEXT: call void @use1(i1 [[I2]])
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 [[I1]], i1 false
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ call void @use1(i1 %i1)
+ call void @use1(i1 %i2)
+ %i3 = select i1 %i2, i1 %i1, i1 false
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; Hands have invertible uses
+define i1 @t7(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @t7(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I1_NOT:%.*]] = xor i1 [[I1]], true
+; CHECK-NEXT: call void @use1(i1 [[I1_NOT]])
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 [[I1]], i1 false
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i1.not = xor i1 %i1, -1
+ call void @use1(i1 %i1.not)
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = select i1 %i2, i1 %i1, i1 false
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @t8(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @t8(
+; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp ne i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I2]])
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 true, i1 [[I1]]
+; CHECK-NEXT: ret i1 [[I3]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ %i2.not = xor i1 %i2, -1
+ call void @use1(i1 %i2.not)
+ %i3 = select i1 %i2, i1 %i1, i1 false
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @t9(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @t9(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I1_NOT:%.*]] = xor i1 [[I1]], true
+; CHECK-NEXT: call void @use1(i1 [[I1_NOT]])
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I2_NOT:%.*]] = xor i1 [[I2]], true
+; CHECK-NEXT: call void @use1(i1 [[I2_NOT]])
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 [[I1]], i1 false
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i1.not = xor i1 %i1, -1
+ call void @use1(i1 %i1.not)
+ %i2 = icmp eq i32 %v2, %v3
+ %i2.not = xor i1 %i2, -1
+ call void @use1(i1 %i2.not)
+ %i3 = select i1 %i2, i1 %i1, i1 false
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; Select can have other uses
+
+; Not all uses can be adapted
+define i1 @n10(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n10(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 [[I1]], i1 false
+; CHECK-NEXT: call void @use1(i1 [[I3]])
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = select i1 %i2, i1 %i1, i1 false
+ call void @use1(i1 %i3)
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; All other uses can be adapted.
+define i1 @t11(i32 %v0, i32 %v1, i32 %v2, i32 %v3, i1 %v4, i1 %v5) {
+; CHECK-LABEL: @t11(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 [[I1]], i1 false
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: [[I5:%.*]] = select i1 [[I3]], i1 [[V4:%.*]], i1 [[V5:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I5]])
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = select i1 %i2, i1 %i1, i1 false
+ %i4 = xor i1 %i3, -1
+ %i5 = select i1 %i3, i1 %v4, i1 %v5
+ call void @use1(i1 %i5)
+ ret i1 %i4
+}
diff --git a/llvm/test/Transforms/InstCombine/sink-not-into-logical-or.ll b/llvm/test/Transforms/InstCombine/sink-not-into-logical-or.ll
new file mode 100644
index 0000000000000..055e81c19bc8b
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/sink-not-into-logical-or.ll
@@ -0,0 +1,211 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
+
+; Transform
+; z = ~(x | y)
+; into:
+; z = ~(~x & ~y)
+; iff both x and y are free to invert.
+
+declare void @use1(i1)
+
+; Most basic positive test
+define i1 @t0(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @t0(
+; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp ne i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 [[I1]], i1 false
+; CHECK-NEXT: ret i1 [[I3]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = select i1 %i2, i1 true, i1 %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; All operands must be invertible
+define i1 @n1(i1 %i1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n1(
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 true, i1 [[I1:%.*]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = select i1 %i2, i1 true, i1 %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @n2(i32 %v0, i32 %v1, i1 %i2) {
+; CHECK-LABEL: @n2(
+; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[NOT_I2:%.*]] = xor i1 [[I2:%.*]], true
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[NOT_I2]], i1 [[I1]], i1 false
+; CHECK-NEXT: ret i1 [[I3]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i3 = select i1 %i2, i1 true, i1 %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @n3(i1 %i1, i1 %i2) {
+; CHECK-LABEL: @n3(
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2:%.*]], i1 true, i1 [[I1:%.*]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i3 = select i1 %i2, i1 true, i1 %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; All other uses of operands must be invertible
+define i1 @n4(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n4(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I1]])
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 true, i1 [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ call void @use1(i1 %i1)
+ %i3 = select i1 %i2, i1 true, i1 %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @n5(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n5(
+; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I2]])
+; CHECK-NEXT: [[NOT_I2:%.*]] = xor i1 [[I2]], true
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[NOT_I2]], i1 [[I1]], i1 false
+; CHECK-NEXT: ret i1 [[I3]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ call void @use1(i1 %i2)
+ %i3 = select i1 %i2, i1 true, i1 %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @n6(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n6(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I1]])
+; CHECK-NEXT: call void @use1(i1 [[I2]])
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 true, i1 [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ call void @use1(i1 %i1)
+ call void @use1(i1 %i2)
+ %i3 = select i1 %i2, i1 true, i1 %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; Hands have invertible uses
+define i1 @t7(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @t7(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I1_NOT:%.*]] = xor i1 [[I1]], true
+; CHECK-NEXT: call void @use1(i1 [[I1_NOT]])
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 true, i1 [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i1.not = xor i1 %i1, -1
+ call void @use1(i1 %i1.not)
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = select i1 %i2, i1 true, i1 %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @t8(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @t8(
+; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp ne i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I2]])
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 [[I1]], i1 false
+; CHECK-NEXT: ret i1 [[I3]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ %i2.not = xor i1 %i2, -1
+ call void @use1(i1 %i2.not)
+ %i3 = select i1 %i2, i1 true, i1 %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @t9(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @t9(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I1_NOT:%.*]] = xor i1 [[I1]], true
+; CHECK-NEXT: call void @use1(i1 [[I1_NOT]])
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I2_NOT:%.*]] = xor i1 [[I2]], true
+; CHECK-NEXT: call void @use1(i1 [[I2_NOT]])
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 true, i1 [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i1.not = xor i1 %i1, -1
+ call void @use1(i1 %i1.not)
+ %i2 = icmp eq i32 %v2, %v3
+ %i2.not = xor i1 %i2, -1
+ call void @use1(i1 %i2.not)
+ %i3 = select i1 %i2, i1 true, i1 %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; Select can have other uses
+
+; Not all uses can be adapted
+define i1 @n10(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n10(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 true, i1 [[I1]]
+; CHECK-NEXT: call void @use1(i1 [[I3]])
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = select i1 %i2, i1 true, i1 %i1
+ call void @use1(i1 %i3)
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; All other uses can be adapted.
+define i1 @t11(i32 %v0, i32 %v1, i32 %v2, i32 %v3, i1 %v4, i1 %v5) {
+; CHECK-LABEL: @t11(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = select i1 [[I2]], i1 true, i1 [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: [[I5:%.*]] = select i1 [[I3]], i1 [[V4:%.*]], i1 [[V5:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I5]])
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = select i1 %i2, i1 true, i1 %i1
+ %i4 = xor i1 %i3, -1
+ %i5 = select i1 %i3, i1 %v4, i1 %v5
+ call void @use1(i1 %i5)
+ ret i1 %i4
+}
diff --git a/llvm/test/Transforms/InstCombine/sink-not-into-or.ll b/llvm/test/Transforms/InstCombine/sink-not-into-or.ll
new file mode 100644
index 0000000000000..1e32220dda120
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/sink-not-into-or.ll
@@ -0,0 +1,215 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
+
+; Transform
+; z = ~(x | y)
+; into:
+; z = ~(~x & ~y)
+; iff both x and y are free to invert.
+
+declare void @use1(i1)
+
+; Most basic positive test
+define i1 @t0(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @t0(
+; CHECK-NEXT: [[I1:%.*]] = icmp ne i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp ne i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I4:%.*]] = and i1 [[I2]], [[I1]]
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = or i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; All operands must be invertible
+define i1 @n1(i1 %i1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n1(
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = or i1 [[I2]], [[I1:%.*]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = or i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @n2(i32 %v0, i32 %v1, i1 %i2) {
+; CHECK-LABEL: @n2(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = or i1 [[I1]], [[I2:%.*]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i3 = or i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @n3(i1 %i1, i1 %i2) {
+; CHECK-LABEL: @n3(
+; CHECK-NEXT: [[I3:%.*]] = or i1 [[I2:%.*]], [[I1:%.*]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i3 = or i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; All other uses of operands must be invertible
+define i1 @n4(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n4(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I1]])
+; CHECK-NEXT: [[I3:%.*]] = or i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ call void @use1(i1 %i1)
+ %i3 = or i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @n5(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n5(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I2]])
+; CHECK-NEXT: [[I3:%.*]] = or i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ call void @use1(i1 %i2)
+ %i3 = or i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @n6(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n6(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I1]])
+; CHECK-NEXT: call void @use1(i1 [[I2]])
+; CHECK-NEXT: [[I3:%.*]] = or i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ call void @use1(i1 %i1)
+ call void @use1(i1 %i2)
+ %i3 = or i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; Hands have invertible uses
+define i1 @t7(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @t7(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I1_NOT:%.*]] = xor i1 [[I1]], true
+; CHECK-NEXT: call void @use1(i1 [[I1_NOT]])
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = or i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i1.not = xor i1 %i1, -1
+ call void @use1(i1 %i1.not)
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = or i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @t8(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @t8(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I2_NOT:%.*]] = xor i1 [[I2]], true
+; CHECK-NEXT: call void @use1(i1 [[I2_NOT]])
+; CHECK-NEXT: [[I3:%.*]] = or i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ %i2.not = xor i1 %i2, -1
+ call void @use1(i1 %i2.not)
+ %i3 = or i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+define i1 @t9(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @t9(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I1_NOT:%.*]] = xor i1 [[I1]], true
+; CHECK-NEXT: call void @use1(i1 [[I1_NOT]])
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I2_NOT:%.*]] = xor i1 [[I2]], true
+; CHECK-NEXT: call void @use1(i1 [[I2_NOT]])
+; CHECK-NEXT: [[I3:%.*]] = or i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I3]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i1.not = xor i1 %i1, -1
+ call void @use1(i1 %i1.not)
+ %i2 = icmp eq i32 %v2, %v3
+ %i2.not = xor i1 %i2, -1
+ call void @use1(i1 %i2.not)
+ %i3 = or i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; Select can have other uses
+
+; Not all uses can be adapted
+define i1 @n10(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
+; CHECK-LABEL: @n10(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = or i1 [[I2]], [[I1]]
+; CHECK-NEXT: call void @use1(i1 [[I3]])
+; CHECK-NEXT: [[I4_DEMORGAN:%.*]] = or i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I4_DEMORGAN]], true
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = or i1 %i2, %i1
+ call void @use1(i1 %i3)
+ %i4 = xor i1 %i3, -1
+ ret i1 %i4
+}
+
+; All other uses can be adapted.
+define i1 @t11(i32 %v0, i32 %v1, i32 %v2, i32 %v3, i1 %v4, i1 %v5) {
+; CHECK-LABEL: @t11(
+; CHECK-NEXT: [[I1:%.*]] = icmp eq i32 [[V0:%.*]], [[V1:%.*]]
+; CHECK-NEXT: [[I2:%.*]] = icmp eq i32 [[V2:%.*]], [[V3:%.*]]
+; CHECK-NEXT: [[I3:%.*]] = or i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4_DEMORGAN:%.*]] = or i1 [[I2]], [[I1]]
+; CHECK-NEXT: [[I4:%.*]] = xor i1 [[I4_DEMORGAN]], true
+; CHECK-NEXT: [[I5:%.*]] = select i1 [[I3]], i1 [[V4:%.*]], i1 [[V5:%.*]]
+; CHECK-NEXT: call void @use1(i1 [[I5]])
+; CHECK-NEXT: ret i1 [[I4]]
+;
+ %i1 = icmp eq i32 %v0, %v1
+ %i2 = icmp eq i32 %v2, %v3
+ %i3 = or i1 %i2, %i1
+ %i4 = xor i1 %i3, -1
+ %i5 = select i1 %i3, i1 %v4, i1 %v5
+ call void @use1(i1 %i5)
+ ret i1 %i4
+}
More information about the llvm-commits
mailing list