llvm-project/llvm/test/Transforms/GVN/local-pre.ll

; RUN: opt < %s -gvn -enable-pre -S | grep {b.pre}

define i32 @main(i32 %p) {
block1:
  
	br i1 true, label %block2, label %block3

block2:
 %a = add i32 %p, 1
 br label %block4

block3:
  br label %block4

block4:
  %b = add i32 %p, 1
  ret i32 %b
}
Change tests from "opt %s" to "opt < %s" so that opt doesn't see the input filename so that opt doesn't print the input filename in the output so that grep lines in the tests don't unintentionally match strings in the input filename. llvm-svn: 81537 2009-09-12 02:01:28 +08:00			`; RUN: opt < %s -gvn -enable-pre -S \| grep {b.pre}`
Add local PRE to GVN. This only operates in cases where it would not increase code size, namely when the instantiated expression would only need to be created in one predecessor. llvm-svn: 52471 2008-06-19 05:41:49 +08:00
			`define i32 @main(i32 %p) {`
			`block1:`

			`br i1 true, label %block2, label %block3`

			`block2:`
			`%a = add i32 %p, 1`
			`br label %block4`

			`block3:`
			`br label %block4`

			`block4:`
			`%b = add i32 %p, 1`
			`ret i32 %b`
			`}`