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      1 ; RUN: opt < %s -instsimplify -S | FileCheck %s
      2 
      3 declare {i8, i1} @llvm.uadd.with.overflow.i8(i8 %a, i8 %b)
      4 
      5 define i1 @test_uadd1() {
      6 ; CHECK-LABEL: @test_uadd1(
      7   %x = call {i8, i1} @llvm.uadd.with.overflow.i8(i8 254, i8 3)
      8   %overflow = extractvalue {i8, i1} %x, 1
      9   ret i1 %overflow
     10 ; CHECK-NEXT: ret i1 true
     11 }
     12 
     13 define i8 @test_uadd2() {
     14 ; CHECK-LABEL: @test_uadd2(
     15   %x = call {i8, i1} @llvm.uadd.with.overflow.i8(i8 254, i8 44)
     16   %result = extractvalue {i8, i1} %x, 0
     17   ret i8 %result
     18 ; CHECK-NEXT: ret i8 42
     19 }
     20 
     21 declare i256 @llvm.cttz.i256(i256 %src, i1 %is_zero_undef)
     22 
     23 define i256 @test_cttz() {
     24 ; CHECK-LABEL: @test_cttz(
     25   %x = call i256 @llvm.cttz.i256(i256 10, i1 false)
     26   ret i256 %x
     27 ; CHECK-NEXT: ret i256 1
     28 }
     29 
     30 declare i256 @llvm.ctpop.i256(i256 %src)
     31 
     32 define i256 @test_ctpop() {
     33 ; CHECK-LABEL: @test_ctpop(
     34   %x = call i256 @llvm.ctpop.i256(i256 10)
     35   ret i256 %x
     36 ; CHECK-NEXT: ret i256 2
     37 }
     38 
     39 ; Test a non-intrinsic that we know about as a library call.
     40 declare float @fabs(float %x)
     41 
     42 define float @test_fabs_libcall() {
     43 ; CHECK-LABEL: @test_fabs_libcall(
     44 
     45   %x = call float @fabs(float -42.0)
     46 ; This is still a real function call, so instsimplify won't nuke it -- other
     47 ; passes have to do that.
     48 ; CHECK-NEXT: call float @fabs
     49 
     50   ret float %x
     51 ; CHECK-NEXT: ret float 4.2{{0+}}e+01
     52 }
     53 
     54 
     55 declare float @llvm.fabs.f32(float) nounwind readnone
     56 declare float @llvm.floor.f32(float) nounwind readnone
     57 declare float @llvm.ceil.f32(float) nounwind readnone
     58 declare float @llvm.trunc.f32(float) nounwind readnone
     59 declare float @llvm.rint.f32(float) nounwind readnone
     60 declare float @llvm.nearbyint.f32(float) nounwind readnone
     61 
     62 ; Test idempotent intrinsics
     63 define float @test_idempotence(float %a) {
     64 ; CHECK-LABEL: @test_idempotence(
     65 
     66 ; CHECK: fabs
     67 ; CHECK-NOT: fabs
     68   %a0 = call float @llvm.fabs.f32(float %a)
     69   %a1 = call float @llvm.fabs.f32(float %a0)
     70 
     71 ; CHECK: floor
     72 ; CHECK-NOT: floor
     73   %b0 = call float @llvm.floor.f32(float %a)
     74   %b1 = call float @llvm.floor.f32(float %b0)
     75 
     76 ; CHECK: ceil
     77 ; CHECK-NOT: ceil
     78   %c0 = call float @llvm.ceil.f32(float %a)
     79   %c1 = call float @llvm.ceil.f32(float %c0)
     80 
     81 ; CHECK: trunc
     82 ; CHECK-NOT: trunc
     83   %d0 = call float @llvm.trunc.f32(float %a)
     84   %d1 = call float @llvm.trunc.f32(float %d0)
     85 
     86 ; CHECK: rint
     87 ; CHECK-NOT: rint
     88   %e0 = call float @llvm.rint.f32(float %a)
     89   %e1 = call float @llvm.rint.f32(float %e0)
     90 
     91 ; CHECK: nearbyint
     92 ; CHECK-NOT: nearbyint
     93   %f0 = call float @llvm.nearbyint.f32(float %a)
     94   %f1 = call float @llvm.nearbyint.f32(float %f0)
     95 
     96   %r0 = fadd float %a1, %b1
     97   %r1 = fadd float %r0, %c1
     98   %r2 = fadd float %r1, %d1
     99   %r3 = fadd float %r2, %e1
    100   %r4 = fadd float %r3, %f1
    101 
    102   ret float %r4
    103 }
    104