mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-30 02:32:08 +00:00
0baa94a13b
int test1(unsigned x) { return (x&8) ? 0 : -1; }
int test3(unsigned x) { return (x&8) ? -1 : 0; }
before (x86_64):
_test1:
andl $8, %edi
cmpl $1, %edi
sbbl %eax, %eax
ret
_test3:
andl $8, %edi
cmpl $1, %edi
sbbl %eax, %eax
notl %eax
ret
after:
_test1:
shrl $3, %edi
andl $1, %edi
leal -1(%rdi), %eax
ret
_test3:
shll $28, %edi
movl %edi, %eax
sarl $31, %eax
ret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128732 91177308-0d34-0410-b5e6-96231b3b80d8
187 lines
4.1 KiB
LLVM
187 lines
4.1 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
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declare i32 @llvm.ctpop.i32(i32)
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declare i32 @llvm.ctlz.i32(i32)
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declare i32 @llvm.cttz.i32(i32)
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define i64 @test1(i32 %x) {
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%t = call i32 @llvm.ctpop.i32(i32 %x)
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%s = sext i32 %t to i64
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ret i64 %s
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; CHECK: @test1
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; CHECK: zext i32 %t
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}
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define i64 @test2(i32 %x) {
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%t = call i32 @llvm.ctlz.i32(i32 %x)
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%s = sext i32 %t to i64
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ret i64 %s
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; CHECK: @test2
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; CHECK: zext i32 %t
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}
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define i64 @test3(i32 %x) {
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%t = call i32 @llvm.cttz.i32(i32 %x)
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%s = sext i32 %t to i64
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ret i64 %s
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; CHECK: @test3
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; CHECK: zext i32 %t
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}
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define i64 @test4(i32 %x) {
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%t = udiv i32 %x, 3
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%s = sext i32 %t to i64
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ret i64 %s
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; CHECK: @test4
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; CHECK: zext i32 %t
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}
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define i64 @test5(i32 %x) {
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%t = urem i32 %x, 30000
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%s = sext i32 %t to i64
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ret i64 %s
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; CHECK: @test5
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; CHECK: zext i32 %t
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}
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define i64 @test6(i32 %x) {
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%u = lshr i32 %x, 3
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%t = mul i32 %u, 3
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%s = sext i32 %t to i64
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ret i64 %s
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; CHECK: @test6
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; CHECK: zext i32 %t
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}
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define i64 @test7(i32 %x) {
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%t = and i32 %x, 511
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%u = sub i32 20000, %t
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%s = sext i32 %u to i64
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ret i64 %s
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; CHECK: @test7
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; CHECK: zext i32 %u to i64
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}
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define i32 @test8(i8 %a, i32 %f, i1 %p, i32* %z) {
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%d = lshr i32 %f, 24
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%e = select i1 %p, i32 %d, i32 0
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%s = trunc i32 %e to i16
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%n = sext i16 %s to i32
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ret i32 %n
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; CHECK: @test8
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; CHECK: %d = lshr i32 %f, 24
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; CHECK: %n = select i1 %p, i32 %d, i32 0
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; CHECK: ret i32 %n
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}
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; rdar://6013816
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define i16 @test9(i16 %t, i1 %cond) nounwind {
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entry:
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br i1 %cond, label %T, label %F
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T:
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%t2 = sext i16 %t to i32
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br label %F
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F:
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%V = phi i32 [%t2, %T], [42, %entry]
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%W = trunc i32 %V to i16
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ret i16 %W
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; CHECK: @test9
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; CHECK: T:
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; CHECK-NEXT: br label %F
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; CHECK: F:
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; CHECK-NEXT: phi i16
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; CHECK-NEXT: ret i16
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}
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; PR2638
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define i32 @test10(i32 %i) nounwind {
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entry:
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%tmp12 = trunc i32 %i to i8
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%tmp16 = shl i8 %tmp12, 6
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%a = ashr i8 %tmp16, 6
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%b = sext i8 %a to i32
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ret i32 %b
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; CHECK: @test10
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; CHECK: shl i32 %i, 30
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; CHECK-NEXT: ashr exact i32
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; CHECK-NEXT: ret i32
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}
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define void @test11(<2 x i16> %srcA, <2 x i16> %srcB, <2 x i16>* %dst) {
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%cmp = icmp eq <2 x i16> %srcB, %srcA
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%sext = sext <2 x i1> %cmp to <2 x i16>
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%tmask = ashr <2 x i16> %sext, <i16 15, i16 15>
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store <2 x i16> %tmask, <2 x i16>* %dst
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ret void
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; CHECK: @test11
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; CHECK-NEXT: icmp eq
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; CHECK-NEXT: sext <2 x i1>
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; CHECK-NEXT: store <2 x i16>
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; CHECK-NEXT: ret
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}
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define i64 @test12(i32 %x) nounwind {
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%shr = lshr i32 %x, 1
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%sub = sub nsw i32 0, %shr
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%conv = sext i32 %sub to i64
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ret i64 %conv
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; CHECK: @test12
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; CHECK: sext
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; CHECK: ret
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}
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define i32 @test13(i32 %x) nounwind {
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%and = and i32 %x, 8
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%cmp = icmp eq i32 %and, 0
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%ext = sext i1 %cmp to i32
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ret i32 %ext
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; CHECK: @test13
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; CHECK-NEXT: %and = lshr i32 %x, 3
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; CHECK-NEXT: %1 = and i32 %and, 1
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; CHECK-NEXT: %sext = add i32 %1, -1
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; CHECK-NEXT: ret i32 %sext
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}
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define i32 @test14(i16 %x) nounwind {
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%and = and i16 %x, 16
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%cmp = icmp ne i16 %and, 16
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%ext = sext i1 %cmp to i32
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ret i32 %ext
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; CHECK: @test14
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; CHECK-NEXT: %and = lshr i16 %x, 4
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; CHECK-NEXT: %1 = and i16 %and, 1
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; CHECK-NEXT: %sext = add i16 %1, -1
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; CHECK-NEXT: %ext = sext i16 %sext to i32
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; CHECK-NEXT: ret i32 %ext
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}
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define i32 @test15(i32 %x) nounwind {
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%and = and i32 %x, 16
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%cmp = icmp ne i32 %and, 0
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%ext = sext i1 %cmp to i32
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ret i32 %ext
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; CHECK: @test15
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; CHECK-NEXT: %1 = shl i32 %x, 27
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; CHECK-NEXT: %sext = ashr i32 %1, 31
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; CHECK-NEXT: ret i32 %sext
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}
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define i32 @test16(i16 %x) nounwind {
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%and = and i16 %x, 8
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%cmp = icmp eq i16 %and, 8
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%ext = sext i1 %cmp to i32
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ret i32 %ext
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; CHECK: @test16
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; CHECK-NEXT: %1 = shl i16 %x, 12
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; CHECK-NEXT: %sext = ashr i16 %1, 15
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; CHECK-NEXT: %ext = sext i16 %sext to i32
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; CHECK-NEXT: ret i32 %ext
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}
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