1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2 ; RUN: llc < %s -mtriple=i386-unknown-linux-gnu | FileCheck %s
4 ; This tests is checking for a case where the x86 load-op-store fusion
5 ; misses a dependence between the fused load and a non-fused operand
6 ; to the load causing a cycle. Here the dependence in question comes
7 ; from the carry in input of the adcl.
9 @vx = external dso_local local_unnamed_addr global <2 x i32>, align 8
11 define void @pr36274(ptr %somewhere) {
12 ; CHECK-LABEL: pr36274:
14 ; CHECK-NEXT: movl vx+4, %eax
15 ; CHECK-NEXT: addl $1, vx
16 ; CHECK-NEXT: adcl $0, %eax
17 ; CHECK-NEXT: movl %eax, vx+4
19 %a1 = getelementptr <2 x i32>, ptr @vx, i32 0, i32 1
20 %x1 = load volatile i32, ptr %a1, align 4
21 %x0 = load volatile i32, ptr @vx, align 8
22 %vx0 = insertelement <2 x i32> undef, i32 %x0, i32 0
23 %vx1 = insertelement <2 x i32> %vx0, i32 %x1, i32 1
24 %x = bitcast <2 x i32> %vx1 to i64
26 %vadd = bitcast i64 %add to <2 x i32>
27 %vx1_0 = extractelement <2 x i32> %vadd, i32 0
28 %vx1_1 = extractelement <2 x i32> %vadd, i32 1
29 store i32 %vx1_0, ptr @vx, align 8
30 store i32 %vx1_1, ptr %a1, align 4