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-rw-r--r--test/CodeGen/X86/codegen-prepare-extload.ll81
1 files changed, 56 insertions, 25 deletions
diff --git a/test/CodeGen/X86/codegen-prepare-extload.ll b/test/CodeGen/X86/codegen-prepare-extload.ll
index 9b27c33..65502b3 100644
--- a/test/CodeGen/X86/codegen-prepare-extload.ll
+++ b/test/CodeGen/X86/codegen-prepare-extload.ll
@@ -12,13 +12,13 @@
; CHECK: movsbl ({{%rdi|%rcx}}), %eax
;
; OPTALL-LABEL: @foo
-; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8* %p
+; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8, i8* %p
; OPTALL-NEXT: [[ZEXT:%[a-zA-Z_0-9-]+]] = zext i8 [[LD]] to i32
; OPTALL: store i32 [[ZEXT]], i32* %q
; OPTALL: ret
define void @foo(i8* %p, i32* %q) {
entry:
- %t = load i8* %p
+ %t = load i8, i8* %p
%a = icmp slt i8 %t, 20
br i1 %a, label %true, label %false
true:
@@ -32,7 +32,7 @@ false:
; Check that we manage to form a zextload is an operation with only one
; argument to explicitly extend is in the the way.
; OPTALL-LABEL: @promoteOneArg
-; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8* %p
+; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8, i8* %p
; OPT-NEXT: [[ZEXT:%[a-zA-Z_0-9-]+]] = zext i8 [[LD]] to i32
; OPT-NEXT: [[RES:%[a-zA-Z_0-9-]+]] = add nuw i32 [[ZEXT]], 2
; Make sure the operation is not promoted when the promotion pass is disabled.
@@ -42,7 +42,7 @@ false:
; OPTALL: ret
define void @promoteOneArg(i8* %p, i32* %q) {
entry:
- %t = load i8* %p
+ %t = load i8, i8* %p
%add = add nuw i8 %t, 2
%a = icmp slt i8 %t, 20
br i1 %a, label %true, label %false
@@ -58,7 +58,7 @@ false:
; argument to explicitly extend is in the the way.
; Version with sext.
; OPTALL-LABEL: @promoteOneArgSExt
-; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8* %p
+; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8, i8* %p
; OPT-NEXT: [[SEXT:%[a-zA-Z_0-9-]+]] = sext i8 [[LD]] to i32
; OPT-NEXT: [[RES:%[a-zA-Z_0-9-]+]] = add nsw i32 [[SEXT]], 2
; DISABLE: [[ADD:%[a-zA-Z_0-9-]+]] = add nsw i8 [[LD]], 2
@@ -67,7 +67,7 @@ false:
; OPTALL: ret
define void @promoteOneArgSExt(i8* %p, i32* %q) {
entry:
- %t = load i8* %p
+ %t = load i8, i8* %p
%add = add nsw i8 %t, 2
%a = icmp slt i8 %t, 20
br i1 %a, label %true, label %false
@@ -90,7 +90,7 @@ false:
; transformation, the regular heuristic does not apply the optimization.
;
; OPTALL-LABEL: @promoteTwoArgZext
-; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8* %p
+; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8, i8* %p
;
; STRESS-NEXT: [[ZEXTLD:%[a-zA-Z_0-9-]+]] = zext i8 [[LD]] to i32
; STRESS-NEXT: [[ZEXTB:%[a-zA-Z_0-9-]+]] = zext i8 %b to i32
@@ -106,7 +106,7 @@ false:
; OPTALL: ret
define void @promoteTwoArgZext(i8* %p, i32* %q, i8 %b) {
entry:
- %t = load i8* %p
+ %t = load i8, i8* %p
%add = add nuw i8 %t, %b
%a = icmp slt i8 %t, 20
br i1 %a, label %true, label %false
@@ -122,7 +122,7 @@ false:
; arguments to explicitly extend is in the the way.
; Version with sext.
; OPTALL-LABEL: @promoteTwoArgSExt
-; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8* %p
+; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8, i8* %p
;
; STRESS-NEXT: [[SEXTLD:%[a-zA-Z_0-9-]+]] = sext i8 [[LD]] to i32
; STRESS-NEXT: [[SEXTB:%[a-zA-Z_0-9-]+]] = sext i8 %b to i32
@@ -137,7 +137,7 @@ false:
; OPTALL: ret
define void @promoteTwoArgSExt(i8* %p, i32* %q, i8 %b) {
entry:
- %t = load i8* %p
+ %t = load i8, i8* %p
%add = add nsw i8 %t, %b
%a = icmp slt i8 %t, 20
br i1 %a, label %true, label %false
@@ -152,7 +152,7 @@ false:
; Check that we do not a zextload if we need to introduce more than
; one additional extension.
; OPTALL-LABEL: @promoteThreeArgZext
-; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8* %p
+; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8, i8* %p
;
; STRESS-NEXT: [[ZEXTLD:%[a-zA-Z_0-9-]+]] = zext i8 [[LD]] to i32
; STRESS-NEXT: [[ZEXTB:%[a-zA-Z_0-9-]+]] = zext i8 %b to i32
@@ -172,7 +172,7 @@ false:
; OPTALL: ret
define void @promoteThreeArgZext(i8* %p, i32* %q, i8 %b, i8 %c) {
entry:
- %t = load i8* %p
+ %t = load i8, i8* %p
%tmp = add nuw i8 %t, %b
%add = add nuw i8 %tmp, %c
%a = icmp slt i8 %t, 20
@@ -188,7 +188,7 @@ false:
; Check that we manage to form a zextload after promoting and merging
; two extensions.
; OPTALL-LABEL: @promoteMergeExtArgZExt
-; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8* %p
+; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8, i8* %p
;
; STRESS-NEXT: [[ZEXTLD:%[a-zA-Z_0-9-]+]] = zext i8 [[LD]] to i32
; STRESS-NEXT: [[ZEXTB:%[a-zA-Z_0-9-]+]] = zext i16 %b to i32
@@ -206,7 +206,7 @@ false:
; OPTALL: ret
define void @promoteMergeExtArgZExt(i8* %p, i32* %q, i16 %b) {
entry:
- %t = load i8* %p
+ %t = load i8, i8* %p
%ext = zext i8 %t to i16
%add = add nuw i16 %ext, %b
%a = icmp slt i8 %t, 20
@@ -223,7 +223,7 @@ false:
; two extensions.
; Version with sext.
; OPTALL-LABEL: @promoteMergeExtArgSExt
-; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8* %p
+; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8, i8* %p
;
; STRESS-NEXT: [[ZEXTLD:%[a-zA-Z_0-9-]+]] = zext i8 [[LD]] to i32
; STRESS-NEXT: [[ZEXTB:%[a-zA-Z_0-9-]+]] = sext i16 %b to i32
@@ -240,7 +240,7 @@ false:
; OPTALL: ret
define void @promoteMergeExtArgSExt(i8* %p, i32* %q, i16 %b) {
entry:
- %t = load i8* %p
+ %t = load i8, i8* %p
%ext = zext i8 %t to i16
%add = add nsw i16 %ext, %b
%a = icmp slt i8 %t, 20
@@ -284,11 +284,11 @@ false:
; 3 identical zext of %ld. The extensions will be CSE'ed by SDag.
;
; OPTALL-LABEL: @severalPromotions
-; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8* %addr1
+; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8, i8* %addr1
; OPT-NEXT: [[ZEXTLD1_1:%[a-zA-Z_0-9-]+]] = zext i8 [[LD]] to i64
; OPT-NEXT: [[ZEXTLD1_2:%[a-zA-Z_0-9-]+]] = zext i8 [[LD]] to i64
; OPT-NEXT: [[ZEXTLD1_3:%[a-zA-Z_0-9-]+]] = zext i8 [[LD]] to i64
-; OPT-NEXT: [[LD2:%[a-zA-Z_0-9-]+]] = load i32* %addr2
+; OPT-NEXT: [[LD2:%[a-zA-Z_0-9-]+]] = load i32, i32* %addr2
; OPT-NEXT: [[SEXTLD2:%[a-zA-Z_0-9-]+]] = sext i32 [[LD2]] to i64
; OPT-NEXT: [[RES:%[a-zA-Z_0-9-]+]] = add nsw i64 [[SEXTLD2]], [[ZEXTLD1_1]]
; We do not combine this one: see 2.b.
@@ -308,9 +308,9 @@ false:
; OPTALL: call void @dummy(i64 [[RES]], i64 [[RESZA]], i64 [[RESB]])
; OPTALL: ret
define void @severalPromotions(i8* %addr1, i32* %addr2, i8 %a, i32 %b) {
- %ld = load i8* %addr1
+ %ld = load i8, i8* %addr1
%zextld = zext i8 %ld to i32
- %ld2 = load i32* %addr2
+ %ld2 = load i32, i32* %addr2
%add = add nsw i32 %ld2, %zextld
%sextadd = sext i32 %add to i64
%zexta = zext i8 %a to i32
@@ -345,19 +345,50 @@ entry:
; to an instruction.
; This used to cause a crash.
; OPTALL-LABEL: @promotionOfArgEndsUpInValue
-; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i16* %addr
+; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i16, i16* %addr
; OPT-NEXT: [[SEXT:%[a-zA-Z_0-9-]+]] = sext i16 [[LD]] to i32
-; OPT-NEXT: [[RES:%[a-zA-Z_0-9-]+]] = add nuw nsw i32 [[SEXT]], zext (i1 icmp ne (i32* getelementptr inbounds ([2 x i32]* @c, i64 0, i64 1), i32* @a) to i32)
+; OPT-NEXT: [[RES:%[a-zA-Z_0-9-]+]] = add nuw nsw i32 [[SEXT]], zext (i1 icmp ne (i32* getelementptr inbounds ([2 x i32], [2 x i32]* @c, i64 0, i64 1), i32* @a) to i32)
;
-; DISABLE-NEXT: [[ADD:%[a-zA-Z_0-9-]+]] = add nuw nsw i16 [[LD]], zext (i1 icmp ne (i32* getelementptr inbounds ([2 x i32]* @c, i64 0, i64 1), i32* @a) to i16)
+; DISABLE-NEXT: [[ADD:%[a-zA-Z_0-9-]+]] = add nuw nsw i16 [[LD]], zext (i1 icmp ne (i32* getelementptr inbounds ([2 x i32], [2 x i32]* @c, i64 0, i64 1), i32* @a) to i16)
; DISABLE-NEXT: [[RES:%[a-zA-Z_0-9-]+]] = sext i16 [[ADD]] to i32
;
; OPTALL-NEXT: ret i32 [[RES]]
define i32 @promotionOfArgEndsUpInValue(i16* %addr) {
entry:
- %val = load i16* %addr
- %add = add nuw nsw i16 %val, zext (i1 icmp ne (i32* getelementptr inbounds ([2 x i32]* @c, i64 0, i64 1), i32* @a) to i16)
+ %val = load i16, i16* %addr
+ %add = add nuw nsw i16 %val, zext (i1 icmp ne (i32* getelementptr inbounds ([2 x i32], [2 x i32]* @c, i64 0, i64 1), i32* @a) to i16)
%conv3 = sext i16 %add to i32
ret i32 %conv3
}
+
+; Check that we see that one zext can be derived from the other for free.
+; OPTALL-LABEL: @promoteTwoArgZextWithSourceExtendedTwice
+; OPTALL: [[LD:%[a-zA-Z_0-9-]+]] = load i8, i8* %p
+
+; OPT-NEXT: [[ZEXT64:%[a-zA-Z_0-9-]+]] = zext i8 [[LD]] to i64
+; OPT-NEXT: [[ZEXT32:%[a-zA-Z_0-9-]+]] = zext i8 [[LD]] to i32
+; OPT-NEXT: [[RES32:%[a-zA-Z_0-9-]+]] = add nuw i32 [[ZEXT32]], %b
+; OPT-NEXT: [[RES64:%[a-zA-Z_0-9-]+]] = add nuw i64 [[ZEXT64]], 12
+; OPT-NEXT: store i32 [[RES32]], i32* %addr
+; OPT-NEXT: store i64 [[RES64]], i64* %q
+;
+; DISABLE-NEXT: [[ZEXT32:%[a-zA-Z_0-9-]+]] = zext i8 [[LD]] to i32
+; DISABLE-NEXT: [[RES32:%[a-zA-Z_0-9-]+]] = add nuw i32 [[ZEXT32]], %b
+; DISABLE-NEXT: [[RES2_32:%[a-zA-Z_0-9-]+]] = add nuw i32 [[ZEXT32]], 12
+; DISABLE-NEXT: store i32 [[RES32]], i32* %addr
+; DISABLE-NEXT: [[ZEXT64:%[a-zA-Z_0-9-]+]] = zext i32 [[RES2_32]] to i64
+; DISABLE-NEXT: store i64 [[ZEXT64]], i64* %q
+;
+; OPTALL-NEXT: ret void
+define void @promoteTwoArgZextWithSourceExtendedTwice(i8* %p, i64* %q, i32 %b, i32* %addr) {
+entry:
+ %t = load i8, i8* %p
+ %zextt = zext i8 %t to i32
+ %add = add nuw i32 %zextt, %b
+ %add2 = add nuw i32 %zextt, 12
+ store i32 %add, i32 *%addr
+ %s = zext i32 %add2 to i64
+ store i64 %s, i64* %q
+ ret void
+}
generated by cgit v1.1 at 2024-12-22 11:40:56 +0000