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llvm-6502/test/Transforms/SimplifyCFG/switch-to-select-multiple-edge-per-block-phi.ll

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Switch to select optimization for two-case switches This is the same optimization of r219233 with modifications to support PHIs with multiple incoming edges from the same block and a test to check that this condition is handled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219656 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-14 01:58:26 +00:00
; RUN: opt < %s -simplifycfg -S | FileCheck %s
; a, b;
; fn1() {
; if (b)
; if (a == 0 || a == 5)
; return a;
; return 0;
; }
; Checking that we handle correctly the case when we have a switch
; branching multiple times to the same block
@b = common global i32 0, align 4
@a = common global i32 0, align 4
; Function Attrs: nounwind
define i32 @fn1() {
; CHECK-LABEL: @fn1
; CHECK: %switch.selectcmp1 = icmp eq i32 %1, 5
; CHECK: %switch.select2 = select i1 %switch.selectcmp1, i32 5, i32 %switch.select
entry:
[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"((?:=|:|^)\s*load (?: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 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230794 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-27 21:17:42 +00:00
%0 = load i32, i32* @b, align 4
Switch to select optimization for two-case switches This is the same optimization of r219233 with modifications to support PHIs with multiple incoming edges from the same block and a test to check that this condition is handled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219656 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-14 01:58:26 +00:00
%tobool = icmp eq i32 %0, 0
br i1 %tobool, label %if.end3, label %if.then
if.then:
[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"((?:=|:|^)\s*load (?: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 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230794 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-27 21:17:42 +00:00
%1 = load i32, i32* @a, align 4
Switch to select optimization for two-case switches This is the same optimization of r219233 with modifications to support PHIs with multiple incoming edges from the same block and a test to check that this condition is handled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219656 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-14 01:58:26 +00:00
switch i32 %1, label %if.end3 [
i32 5, label %return
i32 0, label %return
]
if.end3:
br label %return
return:
%retval.0 = phi i32 [ 0, %if.end3 ], [ %1, %if.then ], [ %1, %if.then ]
ret i32 %retval.0
}
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