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llvm-mirror/test/CodeGen/X86/discontiguous-loops.ll
Dan Gohman b1528d73d1 Re-apply r84295, with fixes to how the loop "top" and "bottom" blocks are
tracked. Instead of trying to manually keep track of these locations
while doing complex modifications, just recompute them when they're needed.
This fixes a bug in which the TopMBB and BotMBB were not correctly updated,
leading to invalid transformations.

llvm-svn: 84598
2009-10-20 04:50:37 +00:00

73 lines
2.4 KiB
LLVM

; RUN: llc -verify-loop-info -verify-dom-info -march=x86-64 < %s
; PR5243
@.str96 = external constant [37 x i8], align 8 ; <[37 x i8]*> [#uses=1]
define void @foo() nounwind {
bb:
br label %ybb1
ybb1: ; preds = %yybb13, %xbb6, %bb
switch i32 undef, label %bb18 [
i32 150, label %ybb2
i32 151, label %bb17
i32 152, label %bb19
i32 157, label %ybb8
]
ybb2: ; preds = %ybb1
%tmp = icmp eq i8** undef, null ; <i1> [#uses=1]
br i1 %tmp, label %bb3, label %xbb6
bb3: ; preds = %ybb2
unreachable
xbb4: ; preds = %xbb6
store i32 0, i32* undef, align 8
br i1 undef, label %xbb6, label %bb5
bb5: ; preds = %xbb4
call fastcc void @decl_mode_check_failed() nounwind
unreachable
xbb6: ; preds = %xbb4, %ybb2
%tmp7 = icmp slt i32 undef, 0 ; <i1> [#uses=1]
br i1 %tmp7, label %xbb4, label %ybb1
ybb8: ; preds = %ybb1
%tmp9 = icmp eq i8** undef, null ; <i1> [#uses=1]
br i1 %tmp9, label %bb10, label %ybb12
bb10: ; preds = %ybb8
%tmp11 = load i8** undef, align 8 ; <i8*> [#uses=1]
call void (i8*, ...)* @fatal(i8* getelementptr inbounds ([37 x i8]* @.str96, i64 0, i64 0), i8* %tmp11) nounwind
unreachable
ybb12: ; preds = %ybb8
br i1 undef, label %bb15, label %ybb13
ybb13: ; preds = %ybb12
%tmp14 = icmp sgt i32 undef, 0 ; <i1> [#uses=1]
br i1 %tmp14, label %bb16, label %ybb1
bb15: ; preds = %ybb12
call void (i8*, ...)* @fatal(i8* getelementptr inbounds ([37 x i8]* @.str96, i64 0, i64 0), i8* undef) nounwind
unreachable
bb16: ; preds = %ybb13
unreachable
bb17: ; preds = %ybb1
unreachable
bb18: ; preds = %ybb1
unreachable
bb19: ; preds = %ybb1
unreachable
}
declare void @fatal(i8*, ...)
declare fastcc void @decl_mode_check_failed() nounwind