1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -S -reassociate -die < %s | FileCheck %s
4 ; The two va_arg instructions depend on the memory/context, are therfore not
5 ; identical and the sub should not be optimized to 0 by reassociate.
9 define i32 @func(i32 %dummy, ...) {
12 ; CHECK-NEXT: [[VARARGS:%.*]] = alloca i8*, align 8
13 ; CHECK-NEXT: [[VARARGS1:%.*]] = bitcast i8** [[VARARGS]] to i8*
14 ; CHECK-NEXT: call void @llvm.va_start(i8* [[VARARGS1]])
15 ; CHECK-NEXT: [[V0:%.*]] = va_arg i8** [[VARARGS]], i32
16 ; CHECK-NEXT: [[V1:%.*]] = va_arg i8** [[VARARGS]], i32
17 ; CHECK-NEXT: [[V0_NEG:%.*]] = sub i32 0, [[V0]]
18 ; CHECK-NEXT: [[SUB:%.*]] = add i32 [[V0_NEG]], 1
19 ; CHECK-NEXT: [[ADD:%.*]] = add i32 [[SUB]], [[V1]]
20 ; CHECK-NEXT: call void @llvm.va_end(i8* [[VARARGS1]])
21 ; CHECK-NEXT: ret i32 [[ADD]]
23 %varargs = alloca i8*, align 8
24 %varargs1 = bitcast i8** %varargs to i8*
25 call void @llvm.va_start(i8* %varargs1)
26 %v0 = va_arg i8** %varargs, i32
27 %v1 = va_arg i8** %varargs, i32
28 %sub = sub nsw i32 %v1, %v0
29 %add = add nsw i32 %sub, 1
30 call void @llvm.va_end(i8* %varargs1)
34 declare void @llvm.va_start(i8*)
35 declare void @llvm.va_end(i8*)