llvm-6502/test/CodeGen/X86/pr12360.ll
Rafael Espindola 95d594cac3 Teach CodeGen's version of computeMaskedBits to understand the range metadata.
This is the CodeGen equivalent of r153747. I tested that there is not noticeable
performance difference with any combination of -O0/-O2 /-g when compiling
gcc as a single compilation unit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153817 91177308-0d34-0410-b5e6-96231b3b80d8
2012-03-31 18:14:00 +00:00

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LLVM

; RUN: llc < %s -march=x86-64 | FileCheck %s
define zeroext i1 @f1(i8* %x) {
entry:
%0 = load i8* %x, align 1, !range !0
%tobool = trunc i8 %0 to i1
ret i1 %tobool
}
; CHECK: f1:
; CHECK: movb (%rdi), %al
; CHECK-NEXT: ret
!0 = metadata !{i8 0, i8 2}