[InstSimplify] [NFC] Tests for Select with AND/OR fold

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338285 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstSimplify/select-and-cmp.ll b/test/Transforms/InstSimplify/select-and-cmp.ll
index 1c1dad7..23eed4c 100644 (file)
--- a/test/Transforms/InstSimplify/select-and-cmp.ll
+++ b/test/Transforms/InstSimplify/select-and-cmp.ll
@@ -1,8 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; RUN: opt < %s -instsimplify -S | FileCheck %s
 
-target triple = "x86_64-unknown-linux-gnu"
-
 define i32 @select_and_icmp(i32 %x, i32 %y, i32 %z) {
 ; CHECK-LABEL: @select_and_icmp(
 ; CHECK-NEXT:    ret i32 [[X:%.*]]
@@ -36,6 +34,66 @@ define i32 @select_and_icmp2(i32 %x, i32 %y, i32 %z) {
   ret i32 %D
 }
 
+define i32 @select_and_icmp_alt(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @select_and_icmp_alt(
+; CHECK-NEXT:    [[A:%.*]] = icmp eq i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp eq i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = and i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp eq i32 %x, %z
+  %B = icmp eq i32 %y, %z
+  %C = and i1 %A, %B
+  %D = select i1 %C, i32 %x, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_and_icmp_alt2(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @select_and_icmp_alt2(
+; CHECK-NEXT:    [[A:%.*]] = icmp eq i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp eq i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = and i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[Y]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp eq i32 %x, %z
+  %B = icmp eq i32 %y, %z
+  %C = and i1 %A, %B
+  %D = select i1 %C, i32 %y, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_and_icmp_inv_alt(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @select_and_icmp_inv_alt(
+; CHECK-NEXT:    [[A:%.*]] = icmp eq i32 [[Z:%.*]], [[X:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp eq i32 [[Z]], [[Y:%.*]]
+; CHECK-NEXT:    [[C:%.*]] = and i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp eq i32 %z, %x
+  %B = icmp eq i32 %z, %y
+  %C = and i1 %A, %B
+  %D = select i1 %C, i32 %x, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_and_inv_icmp_alt(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @select_and_inv_icmp_alt(
+; CHECK-NEXT:    [[A:%.*]] = icmp eq i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp eq i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = and i1 [[B]], [[A]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp eq i32 %x, %z
+  %B = icmp eq i32 %y, %z
+  %C = and i1 %B, %A
+  %D = select i1 %C, i32 %x, i32 %z
+  ret i32 %D
+}
+
 define i32 @select_and_inv_icmp(i32 %x, i32 %y, i32 %z) {
 ; CHECK-LABEL: @select_and_inv_icmp(
 ; CHECK-NEXT:    ret i32 [[X:%.*]]
@@ -47,6 +105,22 @@ define i32 @select_and_inv_icmp(i32 %x, i32 %y, i32 %z) {
   ret i32 %D
 }
 
+define <2 x i8> @select_and_icmp_alt_vec(<2 x i8> %x, <2 x i8> %y, <2 x i8> %z) {
+; CHECK-LABEL: @select_and_icmp_alt_vec(
+; CHECK-NEXT:    [[A:%.*]] = icmp eq <2 x i8> [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp eq <2 x i8> [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = and <2 x i1> [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select <2 x i1> [[C]], <2 x i8> [[X]], <2 x i8> [[Z]]
+; CHECK-NEXT:    ret <2 x i8> [[D]]
+;
+  %A = icmp eq <2 x i8> %x, %z
+  %B = icmp eq <2 x i8> %y, %z
+  %C = and <2 x i1> %A, %B
+  %D = select <2 x i1> %C, <2 x i8> %x, <2 x i8> %z
+  ret <2 x i8> %D
+}
+
+
 define i32 @select_and_icmp_inv(i32 %x, i32 %y, i32 %z) {
 ; CHECK-LABEL: @select_and_icmp_inv(
 ; CHECK-NEXT:    ret i32 [[X:%.*]]
@@ -178,3 +252,108 @@ define i32 @select_and_icmp_bad_op_2(i32 %x, i32 %y, i32 %z, i32 %k) {
   %D = select i1 %C, i32 %z, i32 %x
   ret i32 %D
 }
+
+define i32 @select_and_icmp_alt_bad_1(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @select_and_icmp_alt_bad_1(
+; CHECK-NEXT:    [[A:%.*]] = icmp eq i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp ne i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = and i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp eq i32 %x, %z
+  %B = icmp ne i32 %y, %z
+  %C = and i1 %A, %B
+  %D = select i1 %C, i32 %x, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_and_icmp_alt_bad_2(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @select_and_icmp_alt_bad_2(
+; CHECK-NEXT:    [[A:%.*]] = icmp ne i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp eq i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = and i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp ne i32 %x, %z
+  %B = icmp eq i32 %y, %z
+  %C = and i1 %A, %B
+  %D = select i1 %C, i32 %x, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_and_icmp_alt_bad_3(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @select_and_icmp_alt_bad_3(
+; CHECK-NEXT:    [[A:%.*]] = icmp ne i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp ne i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = and i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp ne i32 %x, %z
+  %B = icmp ne i32 %y, %z
+  %C = and i1 %A, %B
+  %D = select i1 %C, i32 %x, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_and_icmp_alt_bad_4(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @select_and_icmp_alt_bad_4(
+; CHECK-NEXT:    [[A:%.*]] = icmp eq i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp eq i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = or i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp eq i32 %x, %z
+  %B = icmp eq i32 %y, %z
+  %C = or i1 %A, %B
+  %D = select i1 %C, i32 %x, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_and_icmp_alt_bad_5(i32 %x, i32 %y, i32 %z, i32 %k) {
+; CHECK-LABEL: @select_and_icmp_alt_bad_5(
+; CHECK-NEXT:    [[A:%.*]] = icmp eq i32 [[X:%.*]], [[K:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp eq i32 [[Y:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[C:%.*]] = or i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp eq i32 %x, %k
+  %B = icmp eq i32 %y, %z
+  %C = or i1 %A, %B
+  %D = select i1 %C, i32 %x, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_and_icmp_alt_bad_true_val(i32 %x, i32 %y, i32 %z, i32 %k) {
+; CHECK-LABEL: @select_and_icmp_alt_bad_true_val(
+; CHECK-NEXT:    [[A:%.*]] = icmp eq i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp eq i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = and i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[K:%.*]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp eq i32 %x, %z
+  %B = icmp eq i32 %y, %z
+  %C = and i1 %A, %B
+  %D = select i1 %C, i32 %k, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_and_icmp_alt_bad_false_val(i32 %x, i32 %y, i32 %z, i32 %k) {
+; CHECK-LABEL: @select_and_icmp_alt_bad_false_val(
+; CHECK-NEXT:    [[A:%.*]] = icmp eq i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp eq i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = and i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[K:%.*]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp eq i32 %x, %z
+  %B = icmp eq i32 %y, %z
+  %C = and i1 %A, %B
+  %D = select i1 %C, i32 %x, i32 %k
+  ret i32 %D
+}

diff --git a/test/Transforms/InstSimplify/select-or-cmp.ll b/test/Transforms/InstSimplify/select-or-cmp.ll
index dc7299f..1810beb 100644 (file)
--- a/test/Transforms/InstSimplify/select-or-cmp.ll
+++ b/test/Transforms/InstSimplify/select-or-cmp.ll
@@ -1,8 +1,6 @@
 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; RUN: opt < %s -instsimplify -S | FileCheck %s
 
-target triple = "x86_64-unknown-linux-gnu"
-
 define i32 @select_or_icmp(i32 %x, i32 %y, i32 %z) {
 ; CHECK-LABEL: @select_or_icmp(
 ; CHECK-NEXT:    ret i32 [[Z:%.*]]
@@ -36,6 +34,81 @@ define i32 @select_or_icmp2(i32 %x, i32 %y, i32 %z) {
   ret i32 %D
 }
 
+define i32 @select_or_icmp_alt(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @select_or_icmp_alt(
+; CHECK-NEXT:    [[A:%.*]] = icmp ne i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp ne i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = or i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp ne i32 %x, %z
+  %B = icmp ne i32 %y, %z
+  %C = or i1 %A, %B
+  %D = select i1 %C, i32 %x, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_or_icmp_alt2(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @select_or_icmp_alt2(
+; CHECK-NEXT:    [[A:%.*]] = icmp ne i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp ne i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = or i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[Y]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp ne i32 %x, %z
+  %B = icmp ne i32 %y, %z
+  %C = or i1 %A, %B
+  %D = select i1 %C, i32 %y, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_or_icmp_inv_alt(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @select_or_icmp_inv_alt(
+; CHECK-NEXT:    [[A:%.*]] = icmp ne i32 [[Z:%.*]], [[X:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp ne i32 [[Z]], [[Y:%.*]]
+; CHECK-NEXT:    [[C:%.*]] = or i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp ne i32 %z, %x
+  %B = icmp ne i32 %z, %y
+  %C = or i1 %A, %B
+  %D = select i1 %C, i32 %x, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_or_inv_icmp_alt(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @select_or_inv_icmp_alt(
+; CHECK-NEXT:    [[A:%.*]] = icmp ne i32 [[Z:%.*]], [[X:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp ne i32 [[Z]], [[Y:%.*]]
+; CHECK-NEXT:    [[C:%.*]] = or i1 [[B]], [[A]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp ne i32 %z, %x
+  %B = icmp ne i32 %z, %y
+  %C = or i1 %B, %A
+  %D = select i1 %C, i32 %x, i32 %z
+  ret i32 %D
+}
+
+define <2 x i8> @select_or_icmp_alt_vec(<2 x i8> %x, <2 x i8> %y, <2 x i8> %z) {
+; CHECK-LABEL: @select_or_icmp_alt_vec(
+; CHECK-NEXT:    [[A:%.*]] = icmp ne <2 x i8> [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp ne <2 x i8> [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = or <2 x i1> [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select <2 x i1> [[C]], <2 x i8> [[X]], <2 x i8> [[Z]]
+; CHECK-NEXT:    ret <2 x i8> [[D]]
+;
+  %A = icmp ne <2 x i8> %x, %z
+  %B = icmp ne <2 x i8> %y, %z
+  %C = or <2 x i1> %A, %B
+  %D = select <2 x i1> %C, <2 x i8> %x, <2 x i8> %z
+  ret <2 x i8> %D
+}
+
 define i32 @select_or_inv_icmp(i32 %x, i32 %y, i32 %z) {
 ; CHECK-LABEL: @select_or_inv_icmp(
 ; CHECK-NEXT:    ret i32 [[Z:%.*]]
@@ -179,3 +252,108 @@ define i32 @select_or_icmp_bad_op_2(i32 %x, i32 %y, i32 %z, i32 %k) {
   %D = select i1 %C, i32 %z, i32 %x
   ret i32 %D
 }
+
+define i32 @select_or_icmp_alt_bad_1(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @select_or_icmp_alt_bad_1(
+; CHECK-NEXT:    [[A:%.*]] = icmp eq i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp ne i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = or i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp eq i32 %x, %z
+  %B = icmp ne i32 %y, %z
+  %C = or i1 %A, %B
+  %D = select i1 %C, i32 %x, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_or_icmp_alt_bad_2(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @select_or_icmp_alt_bad_2(
+; CHECK-NEXT:    [[A:%.*]] = icmp ne i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp eq i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = or i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp ne i32 %x, %z
+  %B = icmp eq i32 %y, %z
+  %C = or i1 %A, %B
+  %D = select i1 %C, i32 %x, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_or_icmp_alt_bad_3(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @select_or_icmp_alt_bad_3(
+; CHECK-NEXT:    [[A:%.*]] = icmp eq i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp eq i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = or i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp eq i32 %x, %z
+  %B = icmp eq i32 %y, %z
+  %C = or i1 %A, %B
+  %D = select i1 %C, i32 %x, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_or_icmp_alt_bad_4(i32 %x, i32 %y, i32 %z) {
+; CHECK-LABEL: @select_or_icmp_alt_bad_4(
+; CHECK-NEXT:    [[A:%.*]] = icmp ne i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp ne i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = and i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp ne i32 %x, %z
+  %B = icmp ne i32 %y, %z
+  %C = and i1 %A, %B
+  %D = select i1 %C, i32 %x, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_or_icmp_alt_bad_5(i32 %x, i32 %y, i32 %z, i32 %k) {
+; CHECK-LABEL: @select_or_icmp_alt_bad_5(
+; CHECK-NEXT:    [[A:%.*]] = icmp ne i32 [[X:%.*]], [[K:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp ne i32 [[Y:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[C:%.*]] = or i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp ne i32 %x, %k
+  %B = icmp ne i32 %y, %z
+  %C = or i1 %A, %B
+  %D = select i1 %C, i32 %x, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_or_icmp_alt_bad_true_val(i32 %x, i32 %y, i32 %z, i32 %k) {
+; CHECK-LABEL: @select_or_icmp_alt_bad_true_val(
+; CHECK-NEXT:    [[A:%.*]] = icmp ne i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp ne i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = or i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[K:%.*]], i32 [[Z]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp ne i32 %x, %z
+  %B = icmp ne i32 %y, %z
+  %C = or i1 %A, %B
+  %D = select i1 %C, i32 %k, i32 %z
+  ret i32 %D
+}
+
+define i32 @select_or_icmp_alt_bad_false_val(i32 %x, i32 %y, i32 %z, i32 %k) {
+; CHECK-LABEL: @select_or_icmp_alt_bad_false_val(
+; CHECK-NEXT:    [[A:%.*]] = icmp ne i32 [[X:%.*]], [[Z:%.*]]
+; CHECK-NEXT:    [[B:%.*]] = icmp ne i32 [[Y:%.*]], [[Z]]
+; CHECK-NEXT:    [[C:%.*]] = or i1 [[A]], [[B]]
+; CHECK-NEXT:    [[D:%.*]] = select i1 [[C]], i32 [[X]], i32 [[K:%.*]]
+; CHECK-NEXT:    ret i32 [[D]]
+;
+  %A = icmp ne i32 %x, %z
+  %B = icmp ne i32 %y, %z
+  %C = or i1 %A, %B
+  %D = select i1 %C, i32 %x, i32 %k
+  ret i32 %D
+}