llvm-mirror/test/CodeGen/X86/subreg-to-reg-0.ll

; RUN: llc < %s -march=x86-64 | grep mov | count 1

; Do eliminate the zero-extension instruction and rely on
; x86-64's implicit zero-extension!

define i64 @foo(i32* %p) nounwind {
  %t = load i32, i32* %p
  %n = add i32 %t, 1
  %z = zext i32 %n to i64
  ret i64 %z
}
Eliminate more uses of llvm-as and llvm-dis. llvm-svn: 81290 2009-09-09 01:54:48 +02:00			`; RUN: llc < %s -march=x86-64 \| grep mov \| count 1`
Re-enable elimination of unnecessary SUBREG_TO_REG instructions in LowerSubregs, and fix an x86-64 isel bug that this exposed. SUBREG_TO_REG for x86-64 implicit zero extension is only safe for isel to generate when the source is known to always have zeros in the high 32 bits. The EXTRACT_SUBREG instruction does not clear the high 32 bits. llvm-svn: 54444 2008-08-07 04:54:50 +02:00
			`; Do eliminate the zero-extension instruction and rely on`
			`; x86-64's implicit zero-extension!`

			`define i64 @foo(i32* %p) nounwind {`
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction Essentially the same as the GEP change in r230786. A similar migration script can be used to update test cases, though a few more test case improvements/changes were required this time around: (r229269-r229278) import fileinput import sys import re pat = re.compile(r"((?:=\|:\|^)\sload (?:atomic )?(?:volatile )?(.?))(\| addrspace\(\d+\) )\($\| (?:%\|@\|null\|undef\|blockaddress\|getelementptr\|addrspacecast\|bitcast\|inttoptr\|\[\[[a-zA-Z]\|\{\{).$)") for line in sys.stdin: sys.stdout.write(re.sub(pat, r"\1, \2\3*\4", line)) Reviewers: rafael, dexonsmith, grosser Differential Revision: http://reviews.llvm.org/D7649 llvm-svn: 230794 2015-02-27 22:17:42 +01:00			`%t = load i32, i32* %p`
Re-enable elimination of unnecessary SUBREG_TO_REG instructions in LowerSubregs, and fix an x86-64 isel bug that this exposed. SUBREG_TO_REG for x86-64 implicit zero extension is only safe for isel to generate when the source is known to always have zeros in the high 32 bits. The EXTRACT_SUBREG instruction does not clear the high 32 bits. llvm-svn: 54444 2008-08-07 04:54:50 +02:00			`%n = add i32 %t, 1`
			`%z = zext i32 %n to i64`
			`ret i64 %z`
			`}`