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llvm-project/llvm/test/CodeGen/X86/cmovcmov.ll

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; RUN: llc < %s -asm-verbose=false -mtriple=x86_64-unknown-linux | FileCheck %s --check-prefix=CHECK --check-prefix=CMOV
; RUN: llc < %s -asm-verbose=false -mtriple=i686-unknown-linux | FileCheck %s --check-prefix=CHECK --check-prefix=NOCMOV
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
; Test 2xCMOV patterns exposed after legalization.
; One way to do that is with (select (fcmp une/oeq)), which gets
; legalized to setp/setne.
; CHECK-LABEL: test_select_fcmp_oeq_i32:
; CMOV-NEXT: movl %edi, %eax
; CMOV-NEXT: ucomiss %xmm1, %xmm0
; CMOV-NEXT: cmovnel %esi, %eax
; CMOV-NEXT: cmovpl %esi, %eax
; CMOV-NEXT: retq
; NOCMOV-NEXT: flds 8(%esp)
; NOCMOV-NEXT: flds 4(%esp)
; NOCMOV-NEXT: fucompp
; NOCMOV-NEXT: fnstsw %ax
; NOCMOV-NEXT: sahf
; NOCMOV-NEXT: leal 16(%esp), %eax
; NOCMOV-NEXT: jne [[TBB:.LBB[0-9_]+]]
; NOCMOV-NEXT: jp [[TBB]]
; NOCMOV-NEXT: leal 12(%esp), %eax
; NOCMOV-NEXT:[[TBB]]:
; NOCMOV-NEXT: movl (%eax), %eax
; NOCMOV-NEXT: retl
define i32 @test_select_fcmp_oeq_i32(float %a, float %b, i32 %c, i32 %d) #0 {
entry:
%cmp = fcmp oeq float %a, %b
%r = select i1 %cmp, i32 %c, i32 %d
ret i32 %r
}
; CHECK-LABEL: test_select_fcmp_oeq_i64:
; CMOV-NEXT: movq %rdi, %rax
; CMOV-NEXT: ucomiss %xmm1, %xmm0
; CMOV-NEXT: cmovneq %rsi, %rax
; CMOV-NEXT: cmovpq %rsi, %rax
; CMOV-NEXT: retq
; NOCMOV-NEXT: flds 8(%esp)
; NOCMOV-NEXT: flds 4(%esp)
; NOCMOV-NEXT: fucompp
; NOCMOV-NEXT: fnstsw %ax
; NOCMOV-NEXT: sahf
; NOCMOV-NEXT: leal 20(%esp), %ecx
; NOCMOV-NEXT: jne [[TBB:.LBB[0-9_]+]]
; NOCMOV-NEXT: jp [[TBB]]
; NOCMOV-NEXT: leal 12(%esp), %ecx
; NOCMOV-NEXT: [[TBB]]:
; NOCMOV-NEXT: movl (%ecx), %eax
; NOCMOV-NEXT: movl 4(%ecx), %edx
; NOCMOV-NEXT: retl
define i64 @test_select_fcmp_oeq_i64(float %a, float %b, i64 %c, i64 %d) #0 {
entry:
%cmp = fcmp oeq float %a, %b
%r = select i1 %cmp, i64 %c, i64 %d
ret i64 %r
}
; CHECK-LABEL: test_select_fcmp_une_i64:
; CMOV-NEXT: movq %rsi, %rax
; CMOV-NEXT: ucomiss %xmm1, %xmm0
; CMOV-NEXT: cmovneq %rdi, %rax
; CMOV-NEXT: cmovpq %rdi, %rax
; CMOV-NEXT: retq
; NOCMOV-NEXT: flds 8(%esp)
; NOCMOV-NEXT: flds 4(%esp)
; NOCMOV-NEXT: fucompp
; NOCMOV-NEXT: fnstsw %ax
; NOCMOV-NEXT: sahf
; NOCMOV-NEXT: leal 12(%esp), %ecx
; NOCMOV-NEXT: jne [[TBB:.LBB[0-9_]+]]
; NOCMOV-NEXT: jp [[TBB]]
; NOCMOV-NEXT: leal 20(%esp), %ecx
; NOCMOV-NEXT: [[TBB]]:
; NOCMOV-NEXT: movl (%ecx), %eax
; NOCMOV-NEXT: movl 4(%ecx), %edx
; NOCMOV-NEXT: retl
define i64 @test_select_fcmp_une_i64(float %a, float %b, i64 %c, i64 %d) #0 {
entry:
%cmp = fcmp une float %a, %b
%r = select i1 %cmp, i64 %c, i64 %d
ret i64 %r
}
; CHECK-LABEL: test_select_fcmp_oeq_f64:
; CMOV-NEXT: ucomiss %xmm1, %xmm0
; CMOV-NEXT: jne [[TBB:.LBB[0-9_]+]]
; CMOV-NEXT: jp [[TBB]]
; CMOV-NEXT: movaps %xmm2, %xmm3
; CMOV-NEXT: [[TBB]]:
; CMOV-NEXT: movaps %xmm3, %xmm0
; CMOV-NEXT: retq
; NOCMOV-NEXT: flds 8(%esp)
; NOCMOV-NEXT: flds 4(%esp)
; NOCMOV-NEXT: fucompp
; NOCMOV-NEXT: fnstsw %ax
; NOCMOV-NEXT: sahf
; NOCMOV-NEXT: leal 20(%esp), %eax
; NOCMOV-NEXT: jne [[TBB:.LBB[0-9_]+]]
; NOCMOV-NEXT: jp [[TBB]]
; NOCMOV-NEXT: leal 12(%esp), %eax
; NOCMOV-NEXT: [[TBB]]:
; NOCMOV-NEXT: fldl (%eax)
; NOCMOV-NEXT: retl
define double @test_select_fcmp_oeq_f64(float %a, float %b, double %c, double %d) #0 {
entry:
%cmp = fcmp oeq float %a, %b
%r = select i1 %cmp, double %c, double %d
ret double %r
}
; CHECK-LABEL: test_select_fcmp_oeq_v4i32:
; CMOV-NEXT: ucomiss %xmm1, %xmm0
; CMOV-NEXT: jne [[TBB:.LBB[0-9_]+]]
; CMOV-NEXT: jp [[TBB]]
; CMOV-NEXT: movaps %xmm2, %xmm3
; CMOV-NEXT: [[TBB]]:
; CMOV-NEXT: movaps %xmm3, %xmm0
; CMOV-NEXT: retq
; NOCMOV-NEXT: pushl %edi
; NOCMOV-NEXT: pushl %esi
; NOCMOV-NEXT: flds 20(%esp)
; NOCMOV-NEXT: flds 16(%esp)
; NOCMOV-NEXT: fucompp
; NOCMOV-NEXT: fnstsw %ax
; NOCMOV-NEXT: sahf
; NOCMOV-NEXT: leal 40(%esp), %eax
; NOCMOV-NEXT: jne [[TBB:.LBB[0-9_]+]]
; NOCMOV-NEXT: jp [[TBB]]
; NOCMOV-NEXT: leal 24(%esp), %eax
; NOCMOV-NEXT: [[TBB]]:
; NOCMOV-NEXT: movl (%eax), %ecx
; NOCMOV-NEXT: leal 44(%esp), %edx
; NOCMOV-NEXT: jne [[TBB:.LBB[0-9_]+]]
; NOCMOV-NEXT: jp [[TBB]]
; NOCMOV-NEXT: leal 28(%esp), %edx
; NOCMOV-NEXT: [[TBB]]:
; NOCMOV-NEXT: movl 12(%esp), %eax
; NOCMOV-NEXT: movl (%edx), %edx
; NOCMOV-NEXT: leal 48(%esp), %esi
; NOCMOV-NEXT: jne [[TBB:.LBB[0-9_]+]]
; NOCMOV-NEXT: jp [[TBB]]
; NOCMOV-NEXT: leal 32(%esp), %esi
; NOCMOV-NEXT: [[TBB]]:
; NOCMOV-NEXT: movl (%esi), %esi
; NOCMOV-NEXT: leal 52(%esp), %edi
; NOCMOV-NEXT: jne [[TBB:.LBB[0-9_]+]]
; NOCMOV-NEXT: jp [[TBB]]
; NOCMOV-NEXT: leal 36(%esp), %edi
; NOCMOV-NEXT: [[TBB]]:
; NOCMOV-NEXT: movl (%edi), %edi
; NOCMOV-NEXT: movl %edi, 12(%eax)
; NOCMOV-NEXT: movl %esi, 8(%eax)
; NOCMOV-NEXT: movl %edx, 4(%eax)
; NOCMOV-NEXT: movl %ecx, (%eax)
; NOCMOV-NEXT: popl %esi
; NOCMOV-NEXT: popl %edi
; NOCMOV-NEXT: retl $4
define <4 x i32> @test_select_fcmp_oeq_v4i32(float %a, float %b, <4 x i32> %c, <4 x i32> %d) #0 {
entry:
%cmp = fcmp oeq float %a, %b
%r = select i1 %cmp, <4 x i32> %c, <4 x i32> %d
ret <4 x i32> %r
}
; Also make sure we catch the original code-sequence of interest:
; CMOV: [[ONE_F32_LCPI:.LCPI.*]]:
; CMOV-NEXT: .long 1065353216
; CHECK-LABEL: test_zext_fcmp_une:
; CMOV-NEXT: ucomiss %xmm1, %xmm0
; CMOV-NEXT: movss [[ONE_F32_LCPI]](%rip), %xmm0
; CMOV-NEXT: jne [[TBB:.LBB[0-9_]+]]
; CMOV-NEXT: jp [[TBB]]
; CMOV-NEXT: xorps %xmm0, %xmm0
; CMOV-NEXT: [[TBB]]:
; CMOV-NEXT: retq
; NOCMOV: jne
; NOCMOV-NEXT: jp
define float @test_zext_fcmp_une(float %a, float %b) #0 {
entry:
%cmp = fcmp une float %a, %b
%conv1 = zext i1 %cmp to i32
%conv2 = sitofp i32 %conv1 to float
ret float %conv2
}
; CMOV: [[ONE_F32_LCPI:.LCPI.*]]:
; CMOV-NEXT: .long 1065353216
; CHECK-LABEL: test_zext_fcmp_oeq:
; CMOV-NEXT: ucomiss %xmm1, %xmm0
; CMOV-NEXT: xorps %xmm0, %xmm0
; CMOV-NEXT: jne [[TBB:.LBB[0-9_]+]]
; CMOV-NEXT: jp [[TBB]]
; CMOV-NEXT: movss [[ONE_F32_LCPI]](%rip), %xmm0
; CMOV-NEXT: [[TBB]]:
; CMOV-NEXT: retq
; NOCMOV: jne
; NOCMOV-NEXT: jp
define float @test_zext_fcmp_oeq(float %a, float %b) #0 {
entry:
%cmp = fcmp oeq float %a, %b
%conv1 = zext i1 %cmp to i32
%conv2 = sitofp i32 %conv1 to float
ret float %conv2
}
attributes #0 = { nounwind }
@g8 = global i8 0
; The following test failed because llvm had a bug where a structure like:
;
; %12 = CMOV_GR8 %7, %11 ... (lt)
; %13 = CMOV_GR8 %12, %11 ... (gt)
;
; was lowered to:
;
; The first two cmovs got expanded to:
; %bb.0:
; JL_1 %bb.9
; %bb.7:
; JG_1 %bb.9
; %bb.8:
; %bb.9:
; %12 = phi(%7, %bb.8, %11, %bb.0, %12, %bb.7)
; %13 = COPY %12
; Which was invalid as %12 is not the same value as %13
; CHECK-LABEL: no_cascade_opt:
; CMOV-DAG: cmpl %edx, %esi
; CMOV-DAG: movb $20, %al
; CMOV-DAG: movb $20, %dl
; CMOV: jge [[BB2:.LBB[0-9_]+]]
; CMOV: jle [[BB3:.LBB[0-9_]+]]
; CMOV: [[BB0:.LBB[0-9_]+]]
; CMOV: testl %edi, %edi
; CMOV: jne [[BB4:.LBB[0-9_]+]]
; CMOV: [[BB1:.LBB[0-9_]+]]
; CMOV: movb %al, g8(%rip)
; CMOV: retq
; CMOV: [[BB2]]:
; CMOV: movl %ecx, %edx
; CMOV: jg [[BB0]]
; CMOV: [[BB3]]:
; CMOV: movl %edx, %eax
; CMOV: testl %edi, %edi
; CMOV: je [[BB1]]
; CMOV: [[BB4]]:
; CMOV: movl %edx, %eax
; CMOV: movb %al, g8(%rip)
; CMOV: retq
define void @no_cascade_opt(i32 %v0, i32 %v1, i32 %v2, i32 %v3) {
entry:
%c0 = icmp eq i32 %v0, 0
%c1 = icmp slt i32 %v1, %v2
%c2 = icmp sgt i32 %v1, %v2
%trunc = trunc i32 %v3 to i8
%sel0 = select i1 %c1, i8 20, i8 %trunc
%sel1 = select i1 %c2, i8 20, i8 %sel0
%sel2 = select i1 %c0, i8 %sel1, i8 %sel0
store volatile i8 %sel2, i8* @g8
ret void
}
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