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e23a689faf
This commit only handles IfConvertTriangle. To update edge weights of a successor, one interface is added to MachineBasicBlock: /// Set successor weight of a given iterator. setSuccWeight(succ_iterator I, uint32_t weight) An existing testing case test/CodeGen/Thumb2/v8_IT_5.ll is updated, since we now correctly update the edge weights, the cold block is placed at the end of the function and we jump to the cold block. llvm-svn: 200428
43 lines
1.1 KiB
LLVM
43 lines
1.1 KiB
LLVM
; RUN: llc < %s -mtriple=thumbv8 -print-machineinstrs=if-converter -o /dev/null 2>&1 | FileCheck %s
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%struct.S = type { i8* (i8*)*, [1 x i8] }
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define internal zeroext i8 @bar(%struct.S* %x, %struct.S* nocapture %y) nounwind readonly {
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entry:
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%0 = getelementptr inbounds %struct.S* %x, i32 0, i32 1, i32 0
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%1 = load i8* %0, align 1
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%2 = zext i8 %1 to i32
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%3 = and i32 %2, 112
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%4 = icmp eq i32 %3, 0
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br i1 %4, label %return, label %bb
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bb:
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%5 = getelementptr inbounds %struct.S* %y, i32 0, i32 1, i32 0
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%6 = load i8* %5, align 1
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%7 = zext i8 %6 to i32
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%8 = and i32 %7, 112
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%9 = icmp eq i32 %8, 0
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br i1 %9, label %return, label %bb2
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; CHECK: BB#2: derived from LLVM BB %bb2
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; CHECK: Successors according to CFG: BB#3(192) BB#4(192)
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bb2:
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%v10 = icmp eq i32 %3, 16
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br i1 %v10, label %bb4, label %bb3, !prof !0
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bb3:
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%v11 = icmp eq i32 %8, 16
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br i1 %v11, label %bb4, label %return, !prof !1
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bb4:
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%v12 = ptrtoint %struct.S* %x to i32
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%phitmp = trunc i32 %v12 to i8
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ret i8 %phitmp
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return:
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ret i8 1
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}
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!0 = metadata !{metadata !"branch_weights", i32 4, i32 12}
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!1 = metadata !{metadata !"branch_weights", i32 8, i32 16}
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