[llvm] e399c58 - [DAGCombine] Add tests for D57317
Paweł Bylica via llvm-commits
llvm-commits at lists.llvm.org
Sat Oct 1 08:00:15 PDT 2022
Author: Paweł Bylica
Date: 2022-10-01T16:59:44+02:00
New Revision: e399c58778017388a818cabd1b13fcb88b79a432
URL: https://github.com/llvm/llvm-project/commit/e399c58778017388a818cabd1b13fcb88b79a432
DIFF: https://github.com/llvm/llvm-project/commit/e399c58778017388a818cabd1b13fcb88b79a432.diff
LOG: [DAGCombine] Add tests for D57317
Add two tests for D57317: Deduplicate addcarry node using commutativity.
https://reviews.llvm.org/D57317
Added:
Modified:
llvm/test/CodeGen/X86/addcarry.ll
Removed:
################################################################################
diff --git a/llvm/test/CodeGen/X86/addcarry.ll b/llvm/test/CodeGen/X86/addcarry.ll
index 5ef3059863d38..c95525f687cce 100644
--- a/llvm/test/CodeGen/X86/addcarry.ll
+++ b/llvm/test/CodeGen/X86/addcarry.ll
@@ -1393,3 +1393,61 @@ define i32 @addcarry_uge(i32 %a, i32 %b, i32 %x, i32 %y) nounwind {
%r = add i32 %s, %z
ret i32 %r
}
+
+define { i64, i64 } @addcarry_commutative_1(i64 %x0, i64 %x1, i64 %y0, i64 %y1) nounwind {
+; CHECK-LABEL: addcarry_commutative_1:
+; CHECK: # %bb.0:
+; CHECK-NEXT: movq %rdi, %rax
+; CHECK-NEXT: addq %rdx, %rax
+; CHECK-NEXT: movq %rsi, %rax
+; CHECK-NEXT: adcq %rcx, %rax
+; CHECK-NEXT: addq %rdx, %rdi
+; CHECK-NEXT: adcq %rcx, %rsi
+; CHECK-NEXT: movq %rsi, %rdx
+; CHECK-NEXT: retq
+ %z0 = call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 %x0, i64 %y0)
+ %k0 = extractvalue { i64, i1 } %z0, 1
+ %k0z = zext i1 %k0 to i64
+
+ %t1s = add i64 %x1, %y1
+ %z1s = add i64 %t1s, %k0z
+
+ ; same as the above, but args swapped
+ %a1s = add i64 %y1, %x1
+ %b1s = add i64 %a1s, %k0z
+
+ %r0 = insertvalue { i64, i64 } poison, i64 %z1s, 0
+ %r1 = insertvalue { i64, i64 } %r0, i64 %b1s, 1
+ ret { i64, i64 } %r1
+}
+
+define { i64, i64 } @addcarry_commutative_2(i64 %x0, i64 %x1, i64 %y0, i64 %y1) nounwind {
+; CHECK-LABEL: addcarry_commutative_2:
+; CHECK: # %bb.0:
+; CHECK-NEXT: movq %rdi, %rax
+; CHECK-NEXT: addq %rdx, %rax
+; CHECK-NEXT: movq %rsi, %rax
+; CHECK-NEXT: adcq %rcx, %rax
+; CHECK-NEXT: addq %rdx, %rdi
+; CHECK-NEXT: adcq %rcx, %rsi
+; CHECK-NEXT: movq %rsi, %rdx
+; CHECK-NEXT: retq
+ %z0 = call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 %x0, i64 %y0)
+ %k0 = extractvalue { i64, i1 } %z0, 1
+ %k0z = zext i1 %k0 to i64
+
+ %t1 = call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 %x1, i64 %y1)
+ %t1s = extractvalue { i64, i1 } %t1, 0
+ %z1 = call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 %t1s, i64 %k0z)
+ %z1s = extractvalue { i64, i1 } %z1, 0
+
+ ; same as the above, but args swapped
+ %a1 = call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 %y1, i64 %x1)
+ %a1s = extractvalue { i64, i1 } %a1, 0
+ %b1 = call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 %a1s, i64 %k0z)
+ %b1s = extractvalue { i64, i1 } %b1, 0
+
+ %r0 = insertvalue { i64, i64 } poison, i64 %z1s, 0
+ %r1 = insertvalue { i64, i64 } %r0, i64 %b1s, 1
+ ret { i64, i64 } %r1
+}
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