78 lines
2.3 KiB
LLVM
78 lines
2.3 KiB
LLVM
; RUN: llc < %s -print-machineinstrs=expand-isel-pseudos -o /dev/null 2>&1 | FileCheck %s
|
|
|
|
; Hexagon runs passes that renumber the basic blocks, causing this test
|
|
; to fail.
|
|
; XFAIL: hexagon
|
|
|
|
; Bug: PR31899
|
|
; XFAIL: avr
|
|
|
|
; Make sure we have the correct weight attached to each successor.
|
|
define i32 @test2(i32 %x) nounwind uwtable readnone ssp {
|
|
; CHECK-LABEL: 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({{[0-9a-fx/= ]+}}75.29%) BB#4({{[0-9a-fx/= ]+}}24.71%)
|
|
; CHECK: BB#4: derived from LLVM BB %entry
|
|
; CHECK: Successors according to CFG: BB#1({{[0-9a-fx/= ]+}}47.62%) BB#5({{[0-9a-fx/= ]+}}52.38%)
|
|
; CHECK: BB#5: derived from LLVM BB %entry
|
|
; CHECK: Successors according to CFG: BB#1({{[0-9a-fx/= ]+}}36.36%) BB#3({{[0-9a-fx/= ]+}}63.64%)
|
|
|
|
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 = !{!"branch_weights", i32 7, i32 6, i32 4, i32 4, i32 64}
|
|
|
|
|
|
declare void @g(i32)
|
|
define void @left_leaning_weight_balanced_tree(i32 %x) {
|
|
entry:
|
|
switch i32 %x, label %return [
|
|
i32 0, label %bb0
|
|
i32 100, label %bb1
|
|
i32 200, label %bb2
|
|
i32 300, label %bb3
|
|
i32 400, label %bb4
|
|
i32 500, label %bb5
|
|
], !prof !1
|
|
bb0: tail call void @g(i32 0) br label %return
|
|
bb1: tail call void @g(i32 1) br label %return
|
|
bb2: tail call void @g(i32 2) br label %return
|
|
bb3: tail call void @g(i32 3) br label %return
|
|
bb4: tail call void @g(i32 4) br label %return
|
|
bb5: tail call void @g(i32 5) br label %return
|
|
return: ret void
|
|
|
|
; Check that we set branch weights on the pivot cmp instruction correctly.
|
|
; Cases {0,10,20,30} go on the left with weight 13; cases {40,50} go on the
|
|
; right with weight 20.
|
|
;
|
|
; CHECK-LABEL: Machine code for function left_leaning_weight_balanced_tree:
|
|
; CHECK: BB#0: derived from LLVM BB %entry
|
|
; CHECK-NOT: Successors
|
|
; CHECK: Successors according to CFG: BB#8({{[0-9a-fx/= ]+}}39.71%) BB#9({{[0-9a-fx/= ]+}}60.29%)
|
|
}
|
|
|
|
!1 = !{!"branch_weights",
|
|
; Default:
|
|
i32 1,
|
|
; Case 0, 100, 200:
|
|
i32 10, i32 1, i32 1,
|
|
; Case 300, 400, 500:
|
|
i32 1, i32 10, i32 10}
|