[llvm] c78e947 - Change constant in cmov-promotion to avoid optimizations
Amaury Séchet via llvm-commits
llvm-commits at lists.llvm.org
Tue Sep 27 14:14:42 PDT 2022
Author: Amaury Séchet
Date: 2022-09-27T21:14:13Z
New Revision: c78e947d2636eae54ac0d56159e0e4d8018f6cd4
URL: https://github.com/llvm/llvm-project/commit/c78e947d2636eae54ac0d56159e0e4d8018f6cd4
DIFF: https://github.com/llvm/llvm-project/commit/c78e947d2636eae54ac0d56159e0e4d8018f6cd4.diff
LOG: Change constant in cmov-promotion to avoid optimizations
Added:
Modified:
llvm/test/CodeGen/X86/cmov-promotion.ll
Removed:
################################################################################
diff --git a/llvm/test/CodeGen/X86/cmov-promotion.ll b/llvm/test/CodeGen/X86/cmov-promotion.ll
index 12fb5127f612..e96faa7fbb7e 100644
--- a/llvm/test/CodeGen/X86/cmov-promotion.ll
+++ b/llvm/test/CodeGen/X86/cmov-promotion.ll
@@ -126,7 +126,7 @@ define i64 @cmov_zpromotion_32_to_64(i1 %c) {
; CMOV: # %bb.0:
; CMOV-NEXT: testb $1, %dil
; CMOV-NEXT: movl $12414, %ecx # imm = 0x307E
-; CMOV-NEXT: movl $-1, %eax
+; CMOV-NEXT: movl $43107, %eax # imm = 0xA863
; CMOV-NEXT: cmovnel %ecx, %eax
; CMOV-NEXT: retq
;
@@ -136,11 +136,11 @@ define i64 @cmov_zpromotion_32_to_64(i1 %c) {
; NO_CMOV-NEXT: movl $12414, %eax # imm = 0x307E
; NO_CMOV-NEXT: jne .LBB5_2
; NO_CMOV-NEXT: # %bb.1:
-; NO_CMOV-NEXT: movl $-1, %eax
+; NO_CMOV-NEXT: movl $43107, %eax # imm = 0xA863
; NO_CMOV-NEXT: .LBB5_2:
; NO_CMOV-NEXT: xorl %edx, %edx
; NO_CMOV-NEXT: retl
- %t0 = select i1 %c, i32 12414, i32 -1
+ %t0 = select i1 %c, i32 12414, i32 43107
%ret = zext i32 %t0 to i64
ret i64 %ret
}
@@ -175,7 +175,7 @@ define i32 @cmov_spromotion_8_to_32(i1 %c) {
; CMOV: # %bb.0:
; CMOV-NEXT: testb $1, %dil
; CMOV-NEXT: movl $126, %ecx
-; CMOV-NEXT: movl $-1, %eax
+; CMOV-NEXT: movl $99, %eax
; CMOV-NEXT: cmovnel %ecx, %eax
; CMOV-NEXT: retq
;
@@ -185,10 +185,10 @@ define i32 @cmov_spromotion_8_to_32(i1 %c) {
; NO_CMOV-NEXT: movl $126, %eax
; NO_CMOV-NEXT: jne .LBB7_2
; NO_CMOV-NEXT: # %bb.1:
-; NO_CMOV-NEXT: movl $-1, %eax
+; NO_CMOV-NEXT: movl $99, %eax
; NO_CMOV-NEXT: .LBB7_2:
; NO_CMOV-NEXT: retl
- %t0 = select i1 %c, i8 12414, i8 -1
+ %t0 = select i1 %c, i8 12414, i8 43107
%ret = sext i8 %t0 to i32
ret i32 %ret
}
@@ -198,23 +198,21 @@ define i64 @cmov_spromotion_8_to_64(i1 %c) {
; CMOV: # %bb.0:
; CMOV-NEXT: testb $1, %dil
; CMOV-NEXT: movl $126, %ecx
-; CMOV-NEXT: movq $-1, %rax
+; CMOV-NEXT: movl $99, %eax
; CMOV-NEXT: cmovneq %rcx, %rax
; CMOV-NEXT: retq
;
; NO_CMOV-LABEL: cmov_spromotion_8_to_64:
; NO_CMOV: # %bb.0:
; NO_CMOV-NEXT: testb $1, {{[0-9]+}}(%esp)
-; NO_CMOV-NEXT: jne .LBB8_1
-; NO_CMOV-NEXT: # %bb.2:
-; NO_CMOV-NEXT: movl $-1, %eax
-; NO_CMOV-NEXT: movl $-1, %edx
-; NO_CMOV-NEXT: retl
-; NO_CMOV-NEXT: .LBB8_1:
-; NO_CMOV-NEXT: xorl %edx, %edx
; NO_CMOV-NEXT: movl $126, %eax
+; NO_CMOV-NEXT: jne .LBB8_2
+; NO_CMOV-NEXT: # %bb.1:
+; NO_CMOV-NEXT: movl $99, %eax
+; NO_CMOV-NEXT: .LBB8_2:
+; NO_CMOV-NEXT: xorl %edx, %edx
; NO_CMOV-NEXT: retl
- %t0 = select i1 %c, i8 12414, i8 -1
+ %t0 = select i1 %c, i8 12414, i8 43107
%ret = sext i8 %t0 to i64
ret i64 %ret
}
@@ -224,7 +222,7 @@ define i32 @cmov_spromotion_16_to_32(i1 %c) {
; CMOV: # %bb.0:
; CMOV-NEXT: testb $1, %dil
; CMOV-NEXT: movl $12414, %ecx # imm = 0x307E
-; CMOV-NEXT: movl $-1, %eax
+; CMOV-NEXT: movl $-22429, %eax # imm = 0xA863
; CMOV-NEXT: cmovnel %ecx, %eax
; CMOV-NEXT: retq
;
@@ -234,10 +232,10 @@ define i32 @cmov_spromotion_16_to_32(i1 %c) {
; NO_CMOV-NEXT: movl $12414, %eax # imm = 0x307E
; NO_CMOV-NEXT: jne .LBB9_2
; NO_CMOV-NEXT: # %bb.1:
-; NO_CMOV-NEXT: movl $-1, %eax
+; NO_CMOV-NEXT: movl $-22429, %eax # imm = 0xA863
; NO_CMOV-NEXT: .LBB9_2:
; NO_CMOV-NEXT: retl
- %t0 = select i1 %c, i16 12414, i16 -1
+ %t0 = select i1 %c, i16 12414, i16 43107
%ret = sext i16 %t0 to i32
ret i32 %ret
}
@@ -247,23 +245,27 @@ define i64 @cmov_spromotion_16_to_64(i1 %c) {
; CMOV: # %bb.0:
; CMOV-NEXT: testb $1, %dil
; CMOV-NEXT: movl $12414, %ecx # imm = 0x307E
-; CMOV-NEXT: movq $-1, %rax
+; CMOV-NEXT: movq $-22429, %rax # imm = 0xA863
; CMOV-NEXT: cmovneq %rcx, %rax
; CMOV-NEXT: retq
;
; NO_CMOV-LABEL: cmov_spromotion_16_to_64:
; NO_CMOV: # %bb.0:
+; NO_CMOV-NEXT: xorl %edx, %edx
; NO_CMOV-NEXT: testb $1, {{[0-9]+}}(%esp)
-; NO_CMOV-NEXT: jne .LBB10_1
+; NO_CMOV-NEXT: movl $12414, %eax # imm = 0x307E
+; NO_CMOV-NEXT: je .LBB10_1
; NO_CMOV-NEXT: # %bb.2:
-; NO_CMOV-NEXT: movl $-1, %eax
-; NO_CMOV-NEXT: movl $-1, %edx
+; NO_CMOV-NEXT: je .LBB10_3
+; NO_CMOV-NEXT: .LBB10_4:
; NO_CMOV-NEXT: retl
; NO_CMOV-NEXT: .LBB10_1:
-; NO_CMOV-NEXT: xorl %edx, %edx
-; NO_CMOV-NEXT: movl $12414, %eax # imm = 0x307E
+; NO_CMOV-NEXT: movl $-22429, %eax # imm = 0xA863
+; NO_CMOV-NEXT: jne .LBB10_4
+; NO_CMOV-NEXT: .LBB10_3:
+; NO_CMOV-NEXT: movl $-1, %edx
; NO_CMOV-NEXT: retl
- %t0 = select i1 %c, i16 12414, i16 -1
+ %t0 = select i1 %c, i16 12414, i16 43107
%ret = sext i16 %t0 to i64
ret i64 %ret
}
@@ -273,23 +275,21 @@ define i64 @cmov_spromotion_32_to_64(i1 %c) {
; CMOV: # %bb.0:
; CMOV-NEXT: testb $1, %dil
; CMOV-NEXT: movl $12414, %ecx # imm = 0x307E
-; CMOV-NEXT: movq $-1, %rax
+; CMOV-NEXT: movl $43107, %eax # imm = 0xA863
; CMOV-NEXT: cmovneq %rcx, %rax
; CMOV-NEXT: retq
;
; NO_CMOV-LABEL: cmov_spromotion_32_to_64:
; NO_CMOV: # %bb.0:
; NO_CMOV-NEXT: testb $1, {{[0-9]+}}(%esp)
-; NO_CMOV-NEXT: jne .LBB11_1
-; NO_CMOV-NEXT: # %bb.2:
-; NO_CMOV-NEXT: movl $-1, %eax
-; NO_CMOV-NEXT: movl $-1, %edx
-; NO_CMOV-NEXT: retl
-; NO_CMOV-NEXT: .LBB11_1:
-; NO_CMOV-NEXT: xorl %edx, %edx
; NO_CMOV-NEXT: movl $12414, %eax # imm = 0x307E
+; NO_CMOV-NEXT: jne .LBB11_2
+; NO_CMOV-NEXT: # %bb.1:
+; NO_CMOV-NEXT: movl $43107, %eax # imm = 0xA863
+; NO_CMOV-NEXT: .LBB11_2:
+; NO_CMOV-NEXT: xorl %edx, %edx
; NO_CMOV-NEXT: retl
- %t0 = select i1 %c, i32 12414, i32 -1
+ %t0 = select i1 %c, i32 12414, i32 43107
%ret = sext i32 %t0 to i64
ret i64 %ret
}
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