llvm-6502/test/CodeGen/ARM64/cast-opt.ll
Tim Northover 7b837d8c75 ARM64: initial backend import
This adds a second implementation of the AArch64 architecture to LLVM,
accessible in parallel via the "arm64" triple. The plan over the
coming weeks & months is to merge the two into a single backend,
during which time thorough code review should naturally occur.

Everything will be easier with the target in-tree though, hence this
commit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205090 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-29 10:18:08 +00:00

32 lines
998 B
LLVM

; RUN: llc -O3 -march=arm64 -mtriple arm64-apple-ios5.0.0 < %s | FileCheck %s
; <rdar://problem/15992732>
; Zero truncation is not necessary when the values are extended properly
; already.
@block = common global i8* null, align 8
define zeroext i8 @foo(i32 %i1, i32 %i2) {
; CHECK-LABEL: foo:
; CHECK: csinc
; CHECK-NOT: and
entry:
%idxprom = sext i32 %i1 to i64
%0 = load i8** @block, align 8
%arrayidx = getelementptr inbounds i8* %0, i64 %idxprom
%1 = load i8* %arrayidx, align 1
%idxprom1 = sext i32 %i2 to i64
%arrayidx2 = getelementptr inbounds i8* %0, i64 %idxprom1
%2 = load i8* %arrayidx2, align 1
%cmp = icmp eq i8 %1, %2
br i1 %cmp, label %return, label %if.then
if.then: ; preds = %entry
%cmp7 = icmp ugt i8 %1, %2
%conv9 = zext i1 %cmp7 to i8
br label %return
return: ; preds = %entry, %if.then
%retval.0 = phi i8 [ %conv9, %if.then ], [ 1, %entry ]
ret i8 %retval.0
}