condbr_if.ll
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; RUN: llc -x86-condbr-folding=true -mtriple=x86_64-linux-gnu -mcpu=sandybridge %s -o - -verify-machineinstrs | FileCheck %s --check-prefix=MERGE
; RUN: llc -x86-condbr-folding=true -mtriple=x86_64-linux-gnu -mcpu=ivybridge %s -o - -verify-machineinstrs | FileCheck %s --check-prefix=MERGE
; RUN: llc -x86-condbr-folding=true -mtriple=x86_64-linux-gnu -mcpu=haswell %s -o - -verify-machineinstrs | FileCheck %s --check-prefix=MERGE
; RUN: llc -x86-condbr-folding=true -mtriple=x86_64-linux-gnu -mcpu=broadwell %s -o - -verify-machineinstrs | FileCheck %s --check-prefix=MERGE
; RUN: llc -x86-condbr-folding=true -mtriple=x86_64-linux-gnu -mcpu=skylake %s -o - -verify-machineinstrs | FileCheck %s --check-prefix=MERGE
; RUN: llc -x86-condbr-folding=true -mtriple=x86_64-linux-gnu -mcpu=skx %s -o - -verify-machineinstrs | FileCheck %s --check-prefix=MERGE
; RUN: llc -x86-condbr-folding=true -mtriple=x86_64-linux-gnu %s -o - -verify-machineinstrs | FileCheck %s --check-prefix=NOTMERGE
define i32 @length2_1(i32) {
%2 = icmp slt i32 %0, 3
br i1 %2, label %3, label %5
; <label>:3:
%4 = tail call i32 (...) @f1()
br label %13
; <label>:5:
%6 = icmp slt i32 %0, 40
br i1 %6, label %7, label %13
; <label>:7:
%8 = icmp eq i32 %0, 3
br i1 %8, label %9, label %11
; <label>:9:
%10 = tail call i32 (...) @f2()
br label %11
; <label>:11:
%12 = tail call i32 (...) @f3() #2
br label %13
; <label>:13:
ret i32 0
}
; MERGE-LABEL: length2_1
; MERGE: cmpl $3
; MERGE-NEXT: jg
; MERGE-NEXT: jge
; NOTMERGE-LABEL: length2_1
; NOTMERGE: cmpl $2
; NOTMERGE-NEXT: jg
define i32 @length2_2(i32) {
%2 = icmp sle i32 %0, 2
br i1 %2, label %3, label %5
; <label>:3:
%4 = tail call i32 (...) @f1()
br label %13
; <label>:5:
%6 = icmp slt i32 %0, 40
br i1 %6, label %7, label %13
; <label>:7:
%8 = icmp eq i32 %0, 3
br i1 %8, label %9, label %11
; <label>:9:
%10 = tail call i32 (...) @f2()
br label %11
; <label>:11:
%12 = tail call i32 (...) @f3() #2
br label %13
; <label>:13:
ret i32 0
}
; MERGE-LABEL: length2_2
; MERGE: cmpl $3
; MERGE-NEXT: jg
; MERGE-NEXT: jge
; NOTMERGE-LABEL: length2_2
; NOTMERGE: cmpl $2
; NOTMERGE-NEXT: jg
define i32 @length2_3(i32) {
%2 = icmp sgt i32 %0, 3
br i1 %2, label %3, label %5
; <label>:3:
%4 = tail call i32 (...) @f1()
br label %13
; <label>:5:
%6 = icmp sgt i32 %0, -40
br i1 %6, label %7, label %13
; <label>:7:
%8 = icmp eq i32 %0, 3
br i1 %8, label %9, label %11
; <label>:9:
%10 = tail call i32 (...) @f2()
br label %11
; <label>:11:
%12 = tail call i32 (...) @f3() #2
br label %13
; <label>:13:
ret i32 0
}
; MERGE-LABEL: length2_3
; MERGE: cmpl $3
; MERGE-NEXT: jl
; MERGE-NEXT: jle
; NOTMERGE-LABEL: length2_3
; NOTMERGE: cmpl $4
; NOTMERGE-NEXT: jl
define i32 @length2_4(i32) {
%2 = icmp sge i32 %0, 4
br i1 %2, label %3, label %5
; <label>:3:
%4 = tail call i32 (...) @f1()
br label %13
; <label>:5:
%6 = icmp sgt i32 %0, -40
br i1 %6, label %7, label %13
; <label>:7:
%8 = icmp eq i32 %0, 3
br i1 %8, label %9, label %11
; <label>:9:
%10 = tail call i32 (...) @f2()
br label %11
; <label>:11:
%12 = tail call i32 (...) @f3() #2
br label %13
; <label>:13:
ret i32 0
}
; MERGE-LABEL: length2_4
; MERGE: cmpl $3
; MERGE-NEXT: jl
; MERGE-NEXT: jle
; NOTMERGE-LABEL: length2_4
; NOTMERGE: cmpl $4
; NOTMERGE-NEXT: jl
declare i32 @f1(...)
declare i32 @f2(...)
declare i32 @f3(...)
define i32 @length1_1(i32) {
%2 = icmp sgt i32 %0, 5
br i1 %2, label %3, label %5
; <label>:3:
%4 = tail call i32 (...) @f1()
br label %9
; <label>:5:
%6 = icmp eq i32 %0, 5
br i1 %6, label %7, label %9
; <label>:7:
%8 = tail call i32 (...) @f2()
br label %9
; <label>:9:
ret i32 0
}
; MERGE-LABEL: length1_1
; MERGE: cmpl $5
; MERGE-NEXT: jl
; MERGE-NEXT: jle
; NOTMERGE-LABEL: length1_1
; NOTMERGE: cmpl $6
; NOTMERGE-NEXT: jl