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llvm-project/llvm/test/Transforms/SimplifyCFG/2009-01-19-UnconditionalTra...

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Fix SpeculativelyExecuteBB to either speculate all or none of the phis present in the bottom of the CFG triangle, as the transformation isn't ever valuable if the branch can't be eliminated. Also, unify some heuristics between SimplifyCFG's multiple if-converters, for consistency. This fixes rdar://10627242. llvm-svn: 147630
2012-01-06 07:58:56 +08:00
; RUN: opt < %s -simplifycfg -S | FileCheck %s
Fix a problem exposed by PR3354: simplifycfg was making a potentially trapping instruction be executed unconditionally. llvm-svn: 62541
2009-01-20 07:03:13 +08:00
; PR3354
; Do not merge bb1 into the entry block, it might trap.
@G = extern_weak global i32
Fix SpeculativelyExecuteBB to either speculate all or none of the phis present in the bottom of the CFG triangle, as the transformation isn't ever valuable if the branch can't be eliminated. Also, unify some heuristics between SimplifyCFG's multiple if-converters, for consistency. This fixes rdar://10627242. llvm-svn: 147630
2012-01-06 07:58:56 +08:00
; CHECK: @test(
; CHECK: br i1 %tmp25
; CHECK: bb1:
; CHECK: sdiv
Fix a problem exposed by PR3354: simplifycfg was making a potentially trapping instruction be executed unconditionally. llvm-svn: 62541
2009-01-20 07:03:13 +08:00
define i32 @test(i32 %tmp21, i32 %tmp24) {
%tmp25 = icmp sle i32 %tmp21, %tmp24
br i1 %tmp25, label %bb2, label %bb1
bb1: ; preds = %bb
%tmp26 = icmp sgt i32 sdiv (i32 -32768, i32 ptrtoint (i32* @G to i32)), 0
br i1 %tmp26, label %bb6, label %bb2
bb2:
ret i32 42
bb6:
Try to eliminate the use of the 'unwind' instruction. llvm-svn: 139046
2011-09-03 06:41:11 +08:00
ret i32 927
Fix a problem exposed by PR3354: simplifycfg was making a potentially trapping instruction be executed unconditionally. llvm-svn: 62541
2009-01-20 07:03:13 +08:00
}
Fix SpeculativelyExecuteBB to either speculate all or none of the phis present in the bottom of the CFG triangle, as the transformation isn't ever valuable if the branch can't be eliminated. Also, unify some heuristics between SimplifyCFG's multiple if-converters, for consistency. This fixes rdar://10627242. llvm-svn: 147630
2012-01-06 07:58:56 +08:00
; CHECK: @test2(
; CHECK: br i1 %tmp34
; CHECK: bb5:
; CHECK: sdiv
another fix for PR3354 llvm-svn: 62561
2009-01-20 09:15:41 +08:00
define i32 @test2(i32 %tmp21, i32 %tmp24, i1 %tmp34) {
br i1 %tmp34, label %bb5, label %bb6
bb5: ; preds = %bb4
fix a testcase. llvm-svn: 62758
2009-01-22 15:08:58 +08:00
br i1 icmp sgt (i32 sdiv (i32 32767, i32 ptrtoint (i32* @G to i32)), i32 0), label %bb6, label %bb7
another fix for PR3354 llvm-svn: 62561
2009-01-20 09:15:41 +08:00
bb6:
ret i32 42
bb7:
Try to eliminate the use of the 'unwind' instruction. llvm-svn: 139046
2011-09-03 06:41:11 +08:00
ret i32 927
another fix for PR3354 llvm-svn: 62561
2009-01-20 09:15:41 +08:00
}