[llvm] r313575 - [InstCombine] auto-generate complete checks; NFC
Sanjay Patel via llvm-commits
llvm-commits at lists.llvm.org
Mon Sep 18 14:57:57 PDT 2017
Author: spatel
Date: Mon Sep 18 14:57:56 2017
New Revision: 313575
URL: http://llvm.org/viewvc/llvm-project?rev=313575&view=rev
Log:
[InstCombine] auto-generate complete checks; NFC
The code responsible for these transforms has the potential to add 2
instructions and break min/max patterns (PR33301).
Modified:
llvm/trunk/test/Transforms/InstCombine/select-extractelement.ll
Modified: llvm/trunk/test/Transforms/InstCombine/select-extractelement.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/select-extractelement.ll?rev=313575&r1=313574&r2=313575&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/select-extractelement.ll (original)
+++ llvm/trunk/test/Transforms/InstCombine/select-extractelement.ll Mon Sep 18 14:57:56 2017
@@ -2,11 +2,14 @@
declare void @v4float_user(<4 x float>) #0
-
-
define float @extract_one_select(<4 x float> %a, <4 x float> %b, i32 %c) #0 {
; CHECK-LABEL: @extract_one_select(
-; CHECK-NOT: select i1 {{.*}}, <4 x float>
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %c, 0
+; CHECK-NEXT: [[B_ELT:%.*]] = extractelement <4 x float> %b, i32 2
+; CHECK-NEXT: [[A_ELT:%.*]] = extractelement <4 x float> %a, i32 2
+; CHECK-NEXT: [[EXTRACT:%.*]] = select i1 [[CMP]], float [[B_ELT]], float [[A_ELT]]
+; CHECK-NEXT: ret float [[EXTRACT]]
+;
%cmp = icmp ne i32 %c, 0
%sel = select i1 %cmp, <4 x float> %a, <4 x float> %b
%extract = extractelement <4 x float> %sel, i32 2
@@ -16,7 +19,11 @@ define float @extract_one_select(<4 x fl
; Multiple extractelements
define <2 x float> @extract_two_select(<4 x float> %a, <4 x float> %b, i32 %c) #0 {
; CHECK-LABEL: @extract_two_select(
-; CHECK: select i1 {{.*}}, <4 x float>
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %c, 0
+; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], <4 x float> %b, <4 x float> %a
+; CHECK-NEXT: [[BUILD2:%.*]] = shufflevector <4 x float> [[SEL]], <4 x float> undef, <2 x i32> <i32 1, i32 2>
+; CHECK-NEXT: ret <2 x float> [[BUILD2]]
+;
%cmp = icmp ne i32 %c, 0
%sel = select i1 %cmp, <4 x float> %a, <4 x float> %b
%extract1 = extractelement <4 x float> %sel, i32 1
@@ -29,7 +36,12 @@ define <2 x float> @extract_two_select(<
; Select has an extra non-extractelement user, don't change it
define float @extract_one_select_user(<4 x float> %a, <4 x float> %b, i32 %c) #0 {
; CHECK-LABEL: @extract_one_select_user(
-; CHECK: select i1 {{.*}}, <4 x float>
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 %c, 0
+; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], <4 x float> %b, <4 x float> %a
+; CHECK-NEXT: [[EXTRACT:%.*]] = extractelement <4 x float> [[SEL]], i32 2
+; CHECK-NEXT: call void @v4float_user(<4 x float> [[SEL]])
+; CHECK-NEXT: ret float [[EXTRACT]]
+;
%cmp = icmp ne i32 %c, 0
%sel = select i1 %cmp, <4 x float> %a, <4 x float> %b
%extract = extractelement <4 x float> %sel, i32 2
@@ -39,7 +51,12 @@ define float @extract_one_select_user(<4
define float @extract_one_vselect_user(<4 x float> %a, <4 x float> %b, <4 x i32> %c) #0 {
; CHECK-LABEL: @extract_one_vselect_user(
-; CHECK: select <4 x i1> {{.*}}, <4 x float>
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq <4 x i32> %c, zeroinitializer
+; CHECK-NEXT: [[SEL:%.*]] = select <4 x i1> [[CMP]], <4 x float> %b, <4 x float> %a
+; CHECK-NEXT: [[EXTRACT:%.*]] = extractelement <4 x float> [[SEL]], i32 2
+; CHECK-NEXT: call void @v4float_user(<4 x float> [[SEL]])
+; CHECK-NEXT: ret float [[EXTRACT]]
+;
%cmp = icmp ne <4 x i32> %c, zeroinitializer
%sel = select <4 x i1> %cmp, <4 x float> %a, <4 x float> %b
%extract = extractelement <4 x float> %sel, i32 2
@@ -50,7 +67,13 @@ define float @extract_one_vselect_user(<
; Extract from a vector select
define float @extract_one_vselect(<4 x float> %a, <4 x float> %b, <4 x i32> %c) #0 {
; CHECK-LABEL: @extract_one_vselect(
-; CHECK-NOT: select <4 x i1>
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq <4 x i32> %c, zeroinitializer
+; CHECK-NEXT: [[CMP_ELT:%.*]] = extractelement <4 x i1> [[CMP]], i32 0
+; CHECK-NEXT: [[B_ELT:%.*]] = extractelement <4 x float> %b, i32 0
+; CHECK-NEXT: [[A_ELT:%.*]] = extractelement <4 x float> %a, i32 0
+; CHECK-NEXT: [[EXTRACT:%.*]] = select i1 [[CMP_ELT]], float [[B_ELT]], float [[A_ELT]]
+; CHECK-NEXT: ret float [[EXTRACT]]
+;
%cmp = icmp ne <4 x i32> %c, zeroinitializer
%select = select <4 x i1> %cmp, <4 x float> %a, <4 x float> %b
%extract = extractelement <4 x float> %select, i32 0
@@ -60,7 +83,11 @@ define float @extract_one_vselect(<4 x f
; Multiple extractelements from a vector select
define <2 x float> @extract_two_vselect(<4 x float> %a, <4 x float> %b, <4 x i32> %c) #0 {
; CHECK-LABEL: @extract_two_vselect(
-; CHECK-NOT: select i1 {{.*}}, <4 x float>
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq <4 x i32> %c, zeroinitializer
+; CHECK-NEXT: [[SEL:%.*]] = select <4 x i1> [[CMP]], <4 x float> %b, <4 x float> %a
+; CHECK-NEXT: [[BUILD2:%.*]] = shufflevector <4 x float> [[SEL]], <4 x float> undef, <2 x i32> <i32 1, i32 2>
+; CHECK-NEXT: ret <2 x float> [[BUILD2]]
+;
%cmp = icmp ne <4 x i32> %c, zeroinitializer
%sel = select <4 x i1> %cmp, <4 x float> %a, <4 x float> %b
%extract1 = extractelement <4 x float> %sel, i32 1
@@ -74,7 +101,33 @@ define <2 x float> @extract_two_vselect(
; Test multiple extractelements
define <4 x float> @simple_vector_select(<4 x float> %a, <4 x float> %b, <4 x i32> %c) #0 {
; CHECK-LABEL: @simple_vector_select(
-; CHECK-NOT: select i1 {{.*}}, <4 x float>
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[TMP0:%.*]] = extractelement <4 x i32> %c, i32 0
+; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[TMP0]], 0
+; CHECK-NEXT: [[B_ELT:%.*]] = extractelement <4 x float> %b, i32 0
+; CHECK-NEXT: [[A_ELT:%.*]] = extractelement <4 x float> %a, i32 0
+; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[TOBOOL]], float [[B_ELT]], float [[A_ELT]]
+; CHECK-NEXT: [[TMP2:%.*]] = insertelement <4 x float> undef, float [[TMP1]], i32 0
+; CHECK-NEXT: [[TMP3:%.*]] = extractelement <4 x i32> %c, i32 1
+; CHECK-NEXT: [[TOBOOL1:%.*]] = icmp eq i32 [[TMP3]], 0
+; CHECK-NEXT: [[B_ELT1:%.*]] = extractelement <4 x float> %b, i32 1
+; CHECK-NEXT: [[A_ELT2:%.*]] = extractelement <4 x float> %a, i32 1
+; CHECK-NEXT: [[TMP4:%.*]] = select i1 [[TOBOOL1]], float [[B_ELT1]], float [[A_ELT2]]
+; CHECK-NEXT: [[TMP5:%.*]] = insertelement <4 x float> [[TMP2]], float [[TMP4]], i32 1
+; CHECK-NEXT: [[TMP6:%.*]] = extractelement <4 x i32> %c, i32 2
+; CHECK-NEXT: [[TOBOOL6:%.*]] = icmp eq i32 [[TMP6]], 0
+; CHECK-NEXT: [[B_ELT3:%.*]] = extractelement <4 x float> %b, i32 2
+; CHECK-NEXT: [[A_ELT4:%.*]] = extractelement <4 x float> %a, i32 2
+; CHECK-NEXT: [[TMP7:%.*]] = select i1 [[TOBOOL6]], float [[B_ELT3]], float [[A_ELT4]]
+; CHECK-NEXT: [[TMP8:%.*]] = insertelement <4 x float> [[TMP5]], float [[TMP7]], i32 2
+; CHECK-NEXT: [[TMP9:%.*]] = extractelement <4 x i32> %c, i32 3
+; CHECK-NEXT: [[TOBOOL11:%.*]] = icmp eq i32 [[TMP9]], 0
+; CHECK-NEXT: [[B_ELT5:%.*]] = extractelement <4 x float> %b, i32 3
+; CHECK-NEXT: [[A_ELT6:%.*]] = extractelement <4 x float> %a, i32 3
+; CHECK-NEXT: [[TMP10:%.*]] = select i1 [[TOBOOL11]], float [[B_ELT5]], float [[A_ELT6]]
+; CHECK-NEXT: [[TMP11:%.*]] = insertelement <4 x float> [[TMP8]], float [[TMP10]], i32 3
+; CHECK-NEXT: ret <4 x float> [[TMP11]]
+;
entry:
%0 = extractelement <4 x i32> %c, i32 0
%tobool = icmp ne i32 %0, 0
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