[SCCP] Add tests for vectors ins phis (NFC)

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Differential Revision: https://phabricator.intern.facebook.com/D60250891

Author: nikic

llvm/test/Transforms/SCCP/phis.ll

@@ -1,9 +1,14 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
 ; RUN: opt < %s -passes=sccp -S | FileCheck %s
 
 define i1 @float.1(i1 %cmp) {
-; CHECK-LABEL: define i1 @float.1(i1 %cmp) {
-
-; CHECK-LABEL: end:
+; CHECK-LABEL: define i1 @float.1(
+; CHECK-SAME: i1 [[CMP:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    br i1 [[CMP]], label %[[IF_TRUE:.*]], label %[[END:.*]]
+; CHECK:       [[IF_TRUE]]:
+; CHECK-NEXT:    br label %[[END]]
+; CHECK:       [[END]]:
 ; CHECK-NEXT:    ret i1 true
 ;
 entry:
@@ -19,12 +24,16 @@ end:
 }
 
 define i1 @float.2(i1 %cmp) {
-; CHECK-LABEL: define i1 @float.2(i1 %cmp) {
-
-; CHECK-LABEL: end:
-; CHECK-NEXT:    %p = phi float [ 1.000000e+00, %entry ], [ 2.000000e+00, %if.true ]
-; CHECK-NEXT:    %c = fcmp ueq float %p, 1.000000e+00
-; CHECK-NEXT:    ret i1 %c
+; CHECK-LABEL: define i1 @float.2(
+; CHECK-SAME: i1 [[CMP:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*]]:
+; CHECK-NEXT:    br i1 [[CMP]], label %[[IF_TRUE:.*]], label %[[END:.*]]
+; CHECK:       [[IF_TRUE]]:
+; CHECK-NEXT:    br label %[[END]]
+; CHECK:       [[END]]:
+; CHECK-NEXT:    [[P:%.*]] = phi float [ 1.000000e+00, %[[ENTRY]] ], [ 2.000000e+00, %[[IF_TRUE]] ]
+; CHECK-NEXT:    [[C:%.*]] = fcmp ueq float [[P]], 1.000000e+00
+; CHECK-NEXT:    ret i1 [[C]]
 ;
 entry:
   br i1 %cmp, label %if.true, label %end
@@ -39,13 +48,18 @@ end:
 }
 
 define i1 @float.3(float %f, i1 %cmp) {
-; CHECK-LABEL: define i1 @float.3(float %f, i1 %cmp)
-
-; CHECK-LABEL: end:
-; CHECK-NEXT:    %p = phi float [ 1.000000e+00, %entry ], [ %f, %if.true ]
-; CHECK-NEXT:    %c = fcmp ueq float %p, 1.000000e+00
-; CHECK-NEXT:    ret i1 %c
+; CHECK-LABEL: define i1 @float.3(
+; CHECK-SAME: float [[F:%.*]], i1 [[CMP:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*]]:
+; CHECK-NEXT:    br i1 [[CMP]], label %[[IF_TRUE:.*]], label %[[END:.*]]
+; CHECK:       [[IF_TRUE]]:
+; CHECK-NEXT:    br label %[[END]]
+; CHECK:       [[END]]:
+; CHECK-NEXT:    [[P:%.*]] = phi float [ 1.000000e+00, %[[ENTRY]] ], [ [[F]], %[[IF_TRUE]] ]
+; CHECK-NEXT:    [[C:%.*]] = fcmp ueq float [[P]], 1.000000e+00
+; CHECK-NEXT:    ret i1 [[C]]
 ;
+
 entry:
   br i1 %cmp, label %if.true, label %end
 
@@ -60,11 +74,16 @@ end:
 
 
 define i1 @float.4_unreachable(float %f, i1 %cmp) {
-; CHECK-LABEL: define i1 @float.4_unreachable(float %f, i1 %cmp)
-
-; CHECK-LABEL: end:
+; CHECK-LABEL: define i1 @float.4_unreachable(
+; CHECK-SAME: float [[F:%.*]], i1 [[CMP:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
+; CHECK-NEXT:    br i1 [[CMP]], label %[[IF_TRUE:.*]], label %[[END:.*]]
+; CHECK:       [[IF_TRUE]]:
+; CHECK-NEXT:    br label %[[END]]
+; CHECK:       [[END]]:
 ; CHECK-NEXT:    ret i1 false
 ;
+
 entry:
   br i1 %cmp, label %if.true, label %end
 
@@ -79,3 +98,77 @@ end:
   %c = fcmp une float %p, 1.0
   ret i1 %c
 }
+
+define <2 x i16> @phi_vector_merge1(i1 %c, <2 x i8> %a) {
+; CHECK-LABEL: define <2 x i16> @phi_vector_merge1(
+; CHECK-SAME: i1 [[C:%.*]], <2 x i8> [[A:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*]]:
+; CHECK-NEXT:    [[ZEXT:%.*]] = zext <2 x i8> [[A]] to <2 x i16>
+; CHECK-NEXT:    br i1 [[C]], label %[[IF:.*]], label %[[JOIN:.*]]
+; CHECK:       [[IF]]:
+; CHECK-NEXT:    br label %[[JOIN]]
+; CHECK:       [[JOIN]]:
+; CHECK-NEXT:    [[PHI:%.*]] = phi <2 x i16> [ [[ZEXT]], %[[ENTRY]] ], [ <i16 1, i16 2>, %[[IF]] ]
+; CHECK-NEXT:    [[ADD:%.*]] = add <2 x i16> [[PHI]], <i16 2, i16 3>
+; CHECK-NEXT:    ret <2 x i16> [[ADD]]
+;
+entry:
+  %zext = zext <2 x i8> %a to <2 x i16>
+  br i1 %c, label %if, label %join
+
+if:
+  br label %join
+
+join:
+  %phi = phi <2 x i16> [ %zext, %entry ], [ <i16 1, i16 2>, %if ]
+  %add = add <2 x i16> %phi, <i16 2, i16 3>
+  ret <2 x i16> %add
+}
+
+define <2 x i16> @phi_vector_merge2(i1 %c, <2 x i8> %a) {
+; CHECK-LABEL: define <2 x i16> @phi_vector_merge2(
+; CHECK-SAME: i1 [[C:%.*]], <2 x i8> [[A:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*]]:
+; CHECK-NEXT:    [[ZEXT:%.*]] = zext <2 x i8> [[A]] to <2 x i16>
+; CHECK-NEXT:    br i1 [[C]], label %[[IF:.*]], label %[[JOIN:.*]]
+; CHECK:       [[IF]]:
+; CHECK-NEXT:    br label %[[JOIN]]
+; CHECK:       [[JOIN]]:
+; CHECK-NEXT:    [[PHI:%.*]] = phi <2 x i16> [ <i16 1, i16 2>, %[[ENTRY]] ], [ [[ZEXT]], %[[IF]] ]
+; CHECK-NEXT:    [[ADD:%.*]] = add <2 x i16> [[PHI]], <i16 2, i16 3>
+; CHECK-NEXT:    ret <2 x i16> [[ADD]]
+;
+entry:
+  %zext = zext <2 x i8> %a to <2 x i16>
+  br i1 %c, label %if, label %join
+
+if:
+  br label %join
+
+join:
+  %phi = phi <2 x i16> [ <i16 1, i16 2>, %entry ], [ %zext, %if ]
+  %add = add <2 x i16> %phi, <i16 2, i16 3>
+  ret <2 x i16> %add
+}
+
+define <2 x float> @phi_vector_merge_float(i1 %c) {
+; CHECK-LABEL: define <2 x float> @phi_vector_merge_float(
+; CHECK-SAME: i1 [[C:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*]]:
+; CHECK-NEXT:    br i1 [[C]], label %[[IF:.*]], label %[[JOIN:.*]]
+; CHECK:       [[IF]]:
+; CHECK-NEXT:    br label %[[JOIN]]
+; CHECK:       [[JOIN]]:
+; CHECK-NEXT:    [[PHI:%.*]] = phi <2 x float> [ <float 2.000000e+00, float 1.000000e+00>, %[[ENTRY]] ], [ <float 1.000000e+00, float 2.000000e+00>, %[[IF]] ]
+; CHECK-NEXT:    ret <2 x float> [[PHI]]
+;
+entry:
+  br i1 %c, label %if, label %join
+
+if:
+  br label %join
+
+join:
+  %phi = phi <2 x float> [ <float 2.0, float 1.0>, %entry ], [ <float 1.0, float 2.0>, %if ]
+  ret <2 x float> %phi
+}