| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s | FileCheck %s |
| ; |
| ; Check that the isel does not fold the shld, which already folds a load |
| ; and has two uses, into a store. |
| |
| target triple = "i686-unknown-unknown" |
| |
| @A = external dso_local global i32 |
| |
| define i32 @test5(i32 %B, i8 %C) { |
| ; CHECK-LABEL: test5: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: movzbl {{[0-9]+}}(%esp), %ecx |
| ; CHECK-NEXT: movl {{[0-9]+}}(%esp), %edx |
| ; CHECK-NEXT: movl A, %eax |
| ; CHECK-NEXT: shldl %cl, %edx, %eax |
| ; CHECK-NEXT: movl %eax, A |
| ; CHECK-NEXT: retl |
| entry: |
| %tmp.1 = load i32, ptr @A |
| %shift.upgrd.1 = zext i8 %C to i32 |
| %tmp.2 = shl i32 %tmp.1, %shift.upgrd.1 |
| %tmp.3 = sub i8 32, %C |
| %shift.upgrd.2 = zext i8 %tmp.3 to i32 |
| %tmp.4 = lshr i32 %B, %shift.upgrd.2 |
| %tmp.5 = or i32 %tmp.4, %tmp.2 |
| store i32 %tmp.5, ptr @A |
| ret i32 %tmp.5 |
| } |
| |
