llvm/test/CodeGen/X86/fast-isel-fold-mem.ll
Juergen Ributzka 4eddf94a14 [FastISel][X86] Add MachineMemOperand to load/store instructions.
This commit adds MachineMemOperands to load and store instructions. This allows
the peephole optimizer to fold load instructions. Unfortunatelly the peephole
optimizer currently doesn't run at -O0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210858 91177308-0d34-0410-b5e6-96231b3b80d8
2014-06-12 23:27:57 +00:00

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376 B
LLVM

; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s
; RUN: llc < %s -fast-isel -fast-isel-abort -mtriple=x86_64-apple-darwin | FileCheck %s
define i64 @fold_load(i64* %a, i64 %b) {
; CHECK-LABEL: fold_load
; CHECK: addq (%rdi), %rsi
; CHECK-NEXT: movq %rsi, %rax
%1 = load i64* %a, align 8
%2 = add i64 %1, %b
ret i64 %2
}