llvm/test/Transforms/GVN/rle-semidominated.ll

; RUN: opt < %s -basicaa -gvn -S | grep "DEAD = phi i32 "

define i32 @main(i32* %p, i32 %x, i32 %y) {
block1:
  %z = load i32* %p
  %cmp = icmp eq i32 %x, %y
	br i1 %cmp, label %block2, label %block3

block2:
 br label %block4

block3:
  %b = bitcast i32 0 to i32
  store i32 %b, i32* %p
  br label %block4

block4:
  %DEAD = load i32* %p
  ret i32 %DEAD
}
Convert all tests using TCL-style quoting to use shell-style quoting. This was done through the aid of a terrible Perl creation. I will not paste any of the horrors here. Suffice to say, it require multiple staged rounds of replacements, state carried between, and a few nested-construct-parsing hacks that I'm not proud of. It happens, by luck, to be able to deal with all the TCL-quoting patterns in evidence in the LLVM test suite. If anyone is maintaining large out-of-tree test trees, feel free to poke me and I'll send you the steps I used to convert things, as well as answer any painful questions etc. IRC works best for this type of thing I find. Once converted, switch the LLVM lit config to use ShTests the same as Clang. In addition to being able to delete large amounts of Python code from 'lit', this will also simplify the entire test suite and some of lit's architecture. Finally, the test suite runs 33% faster on Linux now. ;] For my 16-hardware-thread (2x 4-core xeon e5520): 36s -> 24s git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159525 91177308-0d34-0410-b5e6-96231b3b80d8 2012-07-02 12:47:22 +00:00			`; RUN: opt < %s -basicaa -gvn -S \| grep "DEAD = phi i32 "`
Add basic support for performing whole-function RLE. Note: This has not yet been thoroughly tested. Use at your own risk. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40489 91177308-0d34-0410-b5e6-96231b3b80d8 2007-07-25 19:57:03 +00:00
Fix PR17952. The symptom is that an assertion is triggered. The assertion was added by me to detect the situation when value is propagated from dead blocks. (We can certainly get rid of assertion; it is safe to do so, because propagating value from dead block to alive join node is certainly ok.) The root cause of this bug is : edge-splitting is conducted on the fly, the edge being split could be a dead edge, therefore the block that split the critial edge needs to be flagged "dead" as well. There are 3 ways to fix this bug: 1) Get rid of the assertion as I mentioned eariler 2) When an dead edge is split, flag the inserted block "dead". 3) proactively split the critical edges connecting dead and live blocks when new dead blocks are revealed. This fix go for 3) with additional 2 LOC. Testing case was added by Rafael the other day. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194424 91177308-0d34-0410-b5e6-96231b3b80d8 2013-11-11 22:00:23 +00:00			`define i32 @main(i32* %p, i32 %x, i32 %y) {`
Add basic support for performing whole-function RLE. Note: This has not yet been thoroughly tested. Use at your own risk. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40489 91177308-0d34-0410-b5e6-96231b3b80d8 2007-07-25 19:57:03 +00:00			`block1:`
			`%z = load i32* %p`
Fix PR17952. The symptom is that an assertion is triggered. The assertion was added by me to detect the situation when value is propagated from dead blocks. (We can certainly get rid of assertion; it is safe to do so, because propagating value from dead block to alive join node is certainly ok.) The root cause of this bug is : edge-splitting is conducted on the fly, the edge being split could be a dead edge, therefore the block that split the critial edge needs to be flagged "dead" as well. There are 3 ways to fix this bug: 1) Get rid of the assertion as I mentioned eariler 2) When an dead edge is split, flag the inserted block "dead". 3) proactively split the critical edges connecting dead and live blocks when new dead blocks are revealed. This fix go for 3) with additional 2 LOC. Testing case was added by Rafael the other day. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194424 91177308-0d34-0410-b5e6-96231b3b80d8 2013-11-11 22:00:23 +00:00			`%cmp = icmp eq i32 %x, %y`
			`br i1 %cmp, label %block2, label %block3`
Add basic support for performing whole-function RLE. Note: This has not yet been thoroughly tested. Use at your own risk. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40489 91177308-0d34-0410-b5e6-96231b3b80d8 2007-07-25 19:57:03 +00:00
			`block2:`
			`br label %block4`

			`block3:`
			`%b = bitcast i32 0 to i32`
			`store i32 %b, i32* %p`
			`br label %block4`

			`block4:`
			`%DEAD = load i32* %p`
			`ret i32 %DEAD`
Convert tests using "\| wc -l \| grep ..." to use the count script. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41097 91177308-0d34-0410-b5e6-96231b3b80d8 2007-08-15 13:36:28 +00:00			`}`