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https://github.com/c64scene-ar/llvm-6502.git
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7c038bc15f
We were previously doing a post-order traversal and operating on the list in reverse, however this would occasionaly cause backedges for loops to be visited before some of the other blocks in the loop. We know use a reverse post-order traversal, which avoids this issue. The reverse post-order traversal is not completely ideal, so we need to manually fixup the list to ensure that inner loop backedges are visited before outer loop backedges. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228186 91177308-0d34-0410-b5e6-96231b3b80d8
43 lines
1.2 KiB
LLVM
43 lines
1.2 KiB
LLVM
; RUN: opt -S -structurizecfg %s -o - | FileCheck %s
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; CHECK-NOT: br i1 true
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define void @blam(i32 addrspace(1)* nocapture %arg, float %arg1, float %arg2) {
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; CHECK: bb:
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bb:
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br label %bb3
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; CHECK: bb3:
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bb3: ; preds = %bb7, %bb
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%tmp = phi i64 [ 0, %bb ], [ %tmp8, %bb7 ]
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%tmp4 = fcmp ult float %arg1, 3.500000e+00
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; CHECK: %0 = xor i1 %tmp4, true
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; CHECK: br i1 %0, label %bb5, label %Flow
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br i1 %tmp4, label %bb7, label %bb5
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; CHECK: bb5:
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bb5: ; preds = %bb3
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%tmp6 = fcmp olt float 0.000000e+00, %arg2
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; CHECK: br label %Flow
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br i1 %tmp6, label %bb10, label %bb7
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; CHECK: Flow:
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; CHECK: br i1 %3, label %bb7, label %Flow1
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; CHECK: bb7
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bb7: ; preds = %bb5, %bb3
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%tmp8 = add nuw nsw i64 %tmp, 1
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%tmp9 = icmp slt i64 %tmp8, 5
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; CHECK: br label %Flow1
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br i1 %tmp9, label %bb3, label %bb10
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; CHECK: Flow1:
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; CHECK: br i1 %7, label %bb10, label %bb3
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; CHECK: bb10
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bb10: ; preds = %bb7, %bb5
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%tmp11 = phi i32 [ 15, %bb5 ], [ 255, %bb7 ]
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store i32 %tmp11, i32 addrspace(1)* %arg, align 4
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ret void
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}
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