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12eb12a774
The dream of a unified check-line auto-generator for all phases of compilation is dead. The llc script has already diverged to be better at its goal, so having 2 scripts that do almost the same thing is just causing confusion. We can rip out the llc ability in update_test_checks.py next and rename it, so it will be clear that we have one script for llc check auto-generation and another for opt. llvm-svn: 305206
37 lines
1.2 KiB
LLVM
37 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s
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; Check that multiple instances of 64-bit constants encodable as
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; 32-bit immediates are merged for code size savings.
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; Immediates with multiple users should not be pulled into instructions when
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; optimizing for code size.
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define i1 @imm_multiple_users(i64 %a, i64* %b) optsize {
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; CHECK-LABEL: imm_multiple_users:
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; CHECK: # BB#0:
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; CHECK-NEXT: movq $-1, %rax
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; CHECK-NEXT: movq %rax, (%rsi)
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; CHECK-NEXT: cmpq %rax, %rdi
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; CHECK-NEXT: sete %al
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; CHECK-NEXT: retq
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store i64 -1, i64* %b, align 8
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%cmp = icmp eq i64 %a, -1
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ret i1 %cmp
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}
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declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1)
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; Inlined memsets requiring multiple same-sized stores should be lowered using
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; the register, rather than immediate, form of stores when optimizing for
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; code size.
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define void @memset_zero(i8* noalias nocapture %D) optsize {
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; CHECK-LABEL: memset_zero:
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; CHECK: # BB#0:
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; CHECK-NEXT: xorl %eax, %eax
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; CHECK-NEXT: movq %rax, 7(%rdi)
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; CHECK-NEXT: movq %rax, (%rdi)
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; CHECK-NEXT: retq
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tail call void @llvm.memset.p0i8.i64(i8* %D, i8 0, i64 15, i32 1, i1 false)
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ret void
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}
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