389 lines
9.6 KiB
LLVM
389 lines
9.6 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-pc-linux -mattr=+bmi,+lzcnt | FileCheck %s
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; LZCNT and TZCNT will always produce the operand size when the input operand
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; is zero. This test is to verify that we efficiently select LZCNT/TZCNT
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; based on the fact that the 'icmp+select' sequence is always redundant
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; in every function defined below.
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define i16 @test1_ctlz(i16 %v) {
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; CHECK-LABEL: test1_ctlz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lzcntw %di, %ax
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; CHECK-NEXT: retq
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%cnt = tail call i16 @llvm.ctlz.i16(i16 %v, i1 true)
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%tobool = icmp eq i16 %v, 0
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%cond = select i1 %tobool, i16 16, i16 %cnt
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ret i16 %cond
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}
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define i32 @test2_ctlz(i32 %v) {
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; CHECK-LABEL: test2_ctlz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lzcntl %edi, %eax
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; CHECK-NEXT: retq
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%cnt = tail call i32 @llvm.ctlz.i32(i32 %v, i1 true)
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%tobool = icmp eq i32 %v, 0
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%cond = select i1 %tobool, i32 32, i32 %cnt
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ret i32 %cond
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}
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define i64 @test3_ctlz(i64 %v) {
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; CHECK-LABEL: test3_ctlz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lzcntq %rdi, %rax
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; CHECK-NEXT: retq
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%cnt = tail call i64 @llvm.ctlz.i64(i64 %v, i1 true)
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%tobool = icmp eq i64 %v, 0
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%cond = select i1 %tobool, i64 64, i64 %cnt
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ret i64 %cond
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}
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define i16 @test4_ctlz(i16 %v) {
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; CHECK-LABEL: test4_ctlz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lzcntw %di, %ax
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; CHECK-NEXT: retq
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%cnt = tail call i16 @llvm.ctlz.i16(i16 %v, i1 true)
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%tobool = icmp eq i16 0, %v
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%cond = select i1 %tobool, i16 16, i16 %cnt
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ret i16 %cond
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}
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define i32 @test5_ctlz(i32 %v) {
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; CHECK-LABEL: test5_ctlz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lzcntl %edi, %eax
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; CHECK-NEXT: retq
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%cnt = tail call i32 @llvm.ctlz.i32(i32 %v, i1 true)
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%tobool = icmp eq i32 0, %v
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%cond = select i1 %tobool, i32 32, i32 %cnt
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ret i32 %cond
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}
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define i64 @test6_ctlz(i64 %v) {
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; CHECK-LABEL: test6_ctlz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lzcntq %rdi, %rax
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; CHECK-NEXT: retq
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%cnt = tail call i64 @llvm.ctlz.i64(i64 %v, i1 true)
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%tobool = icmp eq i64 0, %v
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%cond = select i1 %tobool, i64 64, i64 %cnt
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ret i64 %cond
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}
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define i16 @test10_ctlz(i16* %ptr) {
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; CHECK-LABEL: test10_ctlz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lzcntw (%rdi), %ax
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; CHECK-NEXT: retq
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%v = load i16, i16* %ptr
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%cnt = tail call i16 @llvm.ctlz.i16(i16 %v, i1 true)
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%tobool = icmp eq i16 %v, 0
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%cond = select i1 %tobool, i16 16, i16 %cnt
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ret i16 %cond
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}
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define i32 @test11_ctlz(i32* %ptr) {
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; CHECK-LABEL: test11_ctlz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lzcntl (%rdi), %eax
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; CHECK-NEXT: retq
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%v = load i32, i32* %ptr
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%cnt = tail call i32 @llvm.ctlz.i32(i32 %v, i1 true)
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%tobool = icmp eq i32 %v, 0
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%cond = select i1 %tobool, i32 32, i32 %cnt
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ret i32 %cond
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}
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define i64 @test12_ctlz(i64* %ptr) {
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; CHECK-LABEL: test12_ctlz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lzcntq (%rdi), %rax
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; CHECK-NEXT: retq
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%v = load i64, i64* %ptr
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%cnt = tail call i64 @llvm.ctlz.i64(i64 %v, i1 true)
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%tobool = icmp eq i64 %v, 0
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%cond = select i1 %tobool, i64 64, i64 %cnt
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ret i64 %cond
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}
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define i16 @test13_ctlz(i16* %ptr) {
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; CHECK-LABEL: test13_ctlz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lzcntw (%rdi), %ax
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; CHECK-NEXT: retq
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%v = load i16, i16* %ptr
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%cnt = tail call i16 @llvm.ctlz.i16(i16 %v, i1 true)
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%tobool = icmp eq i16 0, %v
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%cond = select i1 %tobool, i16 16, i16 %cnt
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ret i16 %cond
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}
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define i32 @test14_ctlz(i32* %ptr) {
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; CHECK-LABEL: test14_ctlz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lzcntl (%rdi), %eax
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; CHECK-NEXT: retq
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%v = load i32, i32* %ptr
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%cnt = tail call i32 @llvm.ctlz.i32(i32 %v, i1 true)
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%tobool = icmp eq i32 0, %v
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%cond = select i1 %tobool, i32 32, i32 %cnt
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ret i32 %cond
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}
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define i64 @test15_ctlz(i64* %ptr) {
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; CHECK-LABEL: test15_ctlz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lzcntq (%rdi), %rax
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; CHECK-NEXT: retq
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%v = load i64, i64* %ptr
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%cnt = tail call i64 @llvm.ctlz.i64(i64 %v, i1 true)
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%tobool = icmp eq i64 0, %v
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%cond = select i1 %tobool, i64 64, i64 %cnt
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ret i64 %cond
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}
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define i16 @test1_cttz(i16 %v) {
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; CHECK-LABEL: test1_cttz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: tzcntw %di, %ax
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; CHECK-NEXT: retq
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%cnt = tail call i16 @llvm.cttz.i16(i16 %v, i1 true)
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%tobool = icmp eq i16 %v, 0
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%cond = select i1 %tobool, i16 16, i16 %cnt
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ret i16 %cond
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}
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define i32 @test2_cttz(i32 %v) {
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; CHECK-LABEL: test2_cttz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: tzcntl %edi, %eax
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; CHECK-NEXT: retq
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%cnt = tail call i32 @llvm.cttz.i32(i32 %v, i1 true)
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%tobool = icmp eq i32 %v, 0
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%cond = select i1 %tobool, i32 32, i32 %cnt
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ret i32 %cond
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}
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define i64 @test3_cttz(i64 %v) {
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; CHECK-LABEL: test3_cttz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: tzcntq %rdi, %rax
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; CHECK-NEXT: retq
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%cnt = tail call i64 @llvm.cttz.i64(i64 %v, i1 true)
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%tobool = icmp eq i64 %v, 0
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%cond = select i1 %tobool, i64 64, i64 %cnt
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ret i64 %cond
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}
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define i16 @test4_cttz(i16 %v) {
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; CHECK-LABEL: test4_cttz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: tzcntw %di, %ax
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; CHECK-NEXT: retq
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%cnt = tail call i16 @llvm.cttz.i16(i16 %v, i1 true)
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%tobool = icmp eq i16 0, %v
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%cond = select i1 %tobool, i16 16, i16 %cnt
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ret i16 %cond
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}
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define i32 @test5_cttz(i32 %v) {
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; CHECK-LABEL: test5_cttz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: tzcntl %edi, %eax
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; CHECK-NEXT: retq
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%cnt = tail call i32 @llvm.cttz.i32(i32 %v, i1 true)
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%tobool = icmp eq i32 0, %v
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%cond = select i1 %tobool, i32 32, i32 %cnt
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ret i32 %cond
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}
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define i64 @test6_cttz(i64 %v) {
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; CHECK-LABEL: test6_cttz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: tzcntq %rdi, %rax
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; CHECK-NEXT: retq
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%cnt = tail call i64 @llvm.cttz.i64(i64 %v, i1 true)
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%tobool = icmp eq i64 0, %v
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%cond = select i1 %tobool, i64 64, i64 %cnt
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ret i64 %cond
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}
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define i16 @test10_cttz(i16* %ptr) {
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; CHECK-LABEL: test10_cttz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: tzcntw (%rdi), %ax
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; CHECK-NEXT: retq
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%v = load i16, i16* %ptr
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%cnt = tail call i16 @llvm.cttz.i16(i16 %v, i1 true)
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%tobool = icmp eq i16 %v, 0
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%cond = select i1 %tobool, i16 16, i16 %cnt
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ret i16 %cond
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}
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define i32 @test11_cttz(i32* %ptr) {
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; CHECK-LABEL: test11_cttz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: tzcntl (%rdi), %eax
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; CHECK-NEXT: retq
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%v = load i32, i32* %ptr
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%cnt = tail call i32 @llvm.cttz.i32(i32 %v, i1 true)
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%tobool = icmp eq i32 %v, 0
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%cond = select i1 %tobool, i32 32, i32 %cnt
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ret i32 %cond
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}
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define i64 @test12_cttz(i64* %ptr) {
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; CHECK-LABEL: test12_cttz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: tzcntq (%rdi), %rax
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; CHECK-NEXT: retq
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%v = load i64, i64* %ptr
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%cnt = tail call i64 @llvm.cttz.i64(i64 %v, i1 true)
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%tobool = icmp eq i64 %v, 0
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%cond = select i1 %tobool, i64 64, i64 %cnt
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ret i64 %cond
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}
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define i16 @test13_cttz(i16* %ptr) {
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; CHECK-LABEL: test13_cttz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: tzcntw (%rdi), %ax
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; CHECK-NEXT: retq
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%v = load i16, i16* %ptr
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%cnt = tail call i16 @llvm.cttz.i16(i16 %v, i1 true)
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%tobool = icmp eq i16 0, %v
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%cond = select i1 %tobool, i16 16, i16 %cnt
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ret i16 %cond
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}
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define i32 @test14_cttz(i32* %ptr) {
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; CHECK-LABEL: test14_cttz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: tzcntl (%rdi), %eax
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; CHECK-NEXT: retq
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%v = load i32, i32* %ptr
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%cnt = tail call i32 @llvm.cttz.i32(i32 %v, i1 true)
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%tobool = icmp eq i32 0, %v
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%cond = select i1 %tobool, i32 32, i32 %cnt
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ret i32 %cond
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}
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define i64 @test15_cttz(i64* %ptr) {
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; CHECK-LABEL: test15_cttz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: tzcntq (%rdi), %rax
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; CHECK-NEXT: retq
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%v = load i64, i64* %ptr
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%cnt = tail call i64 @llvm.cttz.i64(i64 %v, i1 true)
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%tobool = icmp eq i64 0, %v
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%cond = select i1 %tobool, i64 64, i64 %cnt
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ret i64 %cond
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}
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define i16 @test4b_ctlz(i16 %v) {
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; CHECK-LABEL: test4b_ctlz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lzcntw %di, %ax
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; CHECK-NEXT: retq
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%cnt = tail call i16 @llvm.ctlz.i16(i16 %v, i1 true)
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%tobool = icmp ne i16 %v, 0
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%cond = select i1 %tobool, i16 %cnt, i16 16
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ret i16 %cond
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}
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define i32 @test5b_ctlz(i32 %v) {
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; CHECK-LABEL: test5b_ctlz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lzcntl %edi, %eax
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; CHECK-NEXT: retq
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%cnt = tail call i32 @llvm.ctlz.i32(i32 %v, i1 true)
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%tobool = icmp ne i32 %v, 0
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%cond = select i1 %tobool, i32 %cnt, i32 32
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ret i32 %cond
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}
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define i64 @test6b_ctlz(i64 %v) {
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; CHECK-LABEL: test6b_ctlz:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lzcntq %rdi, %rax
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; CHECK-NEXT: retq
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%cnt = tail call i64 @llvm.ctlz.i64(i64 %v, i1 true)
|
||
|
|
%tobool = icmp ne i64 %v, 0
|
||
|
|
%cond = select i1 %tobool, i64 %cnt, i64 64
|
||
|
|
ret i64 %cond
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
define i16 @test4b_cttz(i16 %v) {
|
||
|
|
; CHECK-LABEL: test4b_cttz:
|
||
|
|
; CHECK: # %bb.0:
|
||
|
|
; CHECK-NEXT: tzcntw %di, %ax
|
||
|
|
; CHECK-NEXT: retq
|
||
|
|
%cnt = tail call i16 @llvm.cttz.i16(i16 %v, i1 true)
|
||
|
|
%tobool = icmp ne i16 %v, 0
|
||
|
|
%cond = select i1 %tobool, i16 %cnt, i16 16
|
||
|
|
ret i16 %cond
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
define i32 @test5b_cttz(i32 %v) {
|
||
|
|
; CHECK-LABEL: test5b_cttz:
|
||
|
|
; CHECK: # %bb.0:
|
||
|
|
; CHECK-NEXT: tzcntl %edi, %eax
|
||
|
|
; CHECK-NEXT: retq
|
||
|
|
%cnt = tail call i32 @llvm.cttz.i32(i32 %v, i1 true)
|
||
|
|
%tobool = icmp ne i32 %v, 0
|
||
|
|
%cond = select i1 %tobool, i32 %cnt, i32 32
|
||
|
|
ret i32 %cond
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
define i64 @test6b_cttz(i64 %v) {
|
||
|
|
; CHECK-LABEL: test6b_cttz:
|
||
|
|
; CHECK: # %bb.0:
|
||
|
|
; CHECK-NEXT: tzcntq %rdi, %rax
|
||
|
|
; CHECK-NEXT: retq
|
||
|
|
%cnt = tail call i64 @llvm.cttz.i64(i64 %v, i1 true)
|
||
|
|
%tobool = icmp ne i64 %v, 0
|
||
|
|
%cond = select i1 %tobool, i64 %cnt, i64 64
|
||
|
|
ret i64 %cond
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
declare i64 @llvm.cttz.i64(i64, i1)
|
||
|
|
declare i32 @llvm.cttz.i32(i32, i1)
|
||
|
|
declare i16 @llvm.cttz.i16(i16, i1)
|
||
|
|
declare i64 @llvm.ctlz.i64(i64, i1)
|
||
|
|
declare i32 @llvm.ctlz.i32(i32, i1)
|
||
|
|
declare i16 @llvm.ctlz.i16(i16, i1)
|
||
|
|
|