mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-14 11:32:34 +00:00
1a710fdde1
the case of multiple edges from one block to another. A simple example is a switch statement with multiple values to the same destination. The definition of an edge is modified from a pair of blocks to a pair of PredBlock and an index into the successors. Also set the weight correctly when building SelectionDAG from LLVM IR, especially when converting a Switch. IntegersSubsetMapping is updated to calculate the weight for each cluster. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162572 91177308-0d34-0410-b5e6-96231b3b80d8
33 lines
969 B
LLVM
33 lines
969 B
LLVM
; RUN: llc < %s -print-machineinstrs=expand-isel-pseudos -o /dev/null 2>&1 | FileCheck %s
|
|
|
|
; Make sure we have the correct weight attached to each successor.
|
|
define i32 @test2(i32 %x) nounwind uwtable readnone ssp {
|
|
; CHECK: Machine code for function test2:
|
|
entry:
|
|
%conv = sext i32 %x to i64
|
|
switch i64 %conv, label %return [
|
|
i64 0, label %sw.bb
|
|
i64 1, label %sw.bb
|
|
i64 4, label %sw.bb
|
|
i64 5, label %sw.bb1
|
|
], !prof !0
|
|
; CHECK: BB#0: derived from LLVM BB %entry
|
|
; CHECK: Successors according to CFG: BB#2(64) BB#4(14)
|
|
; CHECK: BB#4: derived from LLVM BB %entry
|
|
; CHECK: Successors according to CFG: BB#1(10) BB#5(4)
|
|
; CHECK: BB#5: derived from LLVM BB %entry
|
|
; CHECK: Successors according to CFG: BB#1(4) BB#3(7)
|
|
|
|
sw.bb:
|
|
br label %return
|
|
|
|
sw.bb1:
|
|
br label %return
|
|
|
|
return:
|
|
%retval.0 = phi i32 [ 5, %sw.bb1 ], [ 1, %sw.bb ], [ 0, %entry ]
|
|
ret i32 %retval.0
|
|
}
|
|
|
|
!0 = metadata !{metadata !"branch_weights", i32 7, i32 6, i32 4, i32 4, i32 64}
|