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https://github.com/c64scene-ar/llvm-6502.git
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24b7799a10
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4030 91177308-0d34-0410-b5e6-96231b3b80d8
49 lines
1.5 KiB
LLVM
49 lines
1.5 KiB
LLVM
; This test checks to see if the CEE pass is applying jump-bypassing for values
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; determined by PHI nodes. Because we are coming from a particular block, we
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; know what value a PHI node will take on this edge and should exploit it.
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;
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; This testcase comes from the following C code:
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; void bar(void);
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; void foo(int c) {
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; int i = c ? 2 : 8;
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; while (i < 20) {
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; bar ();
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; i++;
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; }
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; }
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;
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; RUN: if as < %s | opt -cee -simplifycfg | dis | grep bb3
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; RUN: then exit 1
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; RUN: else exit 0
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; RUN: fi
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implementation
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declare void %bar()
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void %foo(int %c) {
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bb0: ; No predecessors!
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%cond215 = seteq int %c, 0 ; <bool> [#uses=1]
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br bool %cond215, label %bb3, label %bb4
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bb3: ; preds = %bb0
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br label %bb4
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bb4: ; preds = %bb3, %bb0
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%reg110 = phi int [ 8, %bb3 ], [ 2, %bb0 ] ; <int> [#uses=2]
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%cond217 = setgt int %reg110, 19 ; <bool> [#uses=1]
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br bool %cond217, label %bb6, label %bb5
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bb5: ; preds = %bb5, %bb4
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%cann-indvar = phi int [ 0, %bb4 ], [ %add1-indvar, %bb5 ] ; <int> [#uses=2]
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%add1-indvar = add int %cann-indvar, 1 ; <int> [#uses=1]
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%reg111 = add int %cann-indvar, %reg110 ; <int> [#uses=1]
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call void %bar( )
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%reg112 = add int %reg111, 1 ; <int> [#uses=1]
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%cond222 = setle int %reg112, 19 ; <bool> [#uses=1]
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br bool %cond222, label %bb5, label %bb6
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bb6: ; preds = %bb5, %bb4
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ret void
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}
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