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llvm-6502/test/Transforms/InstCombine/cast-int-fcmp-eq-0.ll

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Convert fcmp with 0.0 from casted integers to icmp This is already handled in general when it is known the conversion can't lose bits with smaller integer types casted into wider floating point types. This pattern happens somewhat often in GPU programs that cast workitem intrinsics to float, which are often compared with 0. Specifically handle the special case of compares with zero which should also be known to not lose information. I had a more general version of this which allows equality compares if the casted float is exactly representable in the integer, but I'm not 100% confident that is always correct. Also fold cases that aren't integers to true / false. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225265 91177308-0d34-0410-b5e6-96231b3b80d8
2015-01-06 15:50:59 +00:00
; RUN: opt -S -instcombine < %s | FileCheck %s
; CHECK-LABEL: @i32_cast_cmp_oeq_int_0_uitofp(
; CHECK-NEXT: icmp eq i32 %i, 0
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_oeq_int_0_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp oeq float %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_int_n0_uitofp(
; CHECK: uitofp
; CHECK: fcmp oeq
define i1 @i32_cast_cmp_oeq_int_n0_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp oeq float %f, -0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_int_0_sitofp(
; CHECK-NEXT: icmp eq i32 %i, 0
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_oeq_int_0_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp oeq float %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_int_n0_sitofp(
; CHECK: sitofp
; CHECK: fcmp oeq
define i1 @i32_cast_cmp_oeq_int_n0_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp oeq float %f, -0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_one_int_0_uitofp(
; CHECK-NEXT: icmp ne i32 %i, 0
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_one_int_0_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp one float %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_one_int_n0_uitofp(
; CHECK: uitofp
; CHECK: fcmp one
define i1 @i32_cast_cmp_one_int_n0_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp one float %f, -0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_one_int_0_sitofp(
; CHECK-NEXT: icmp ne i32 %i, 0
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_one_int_0_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp one float %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_one_int_n0_sitofp(
; CHECK: sitofp
; CHECK: fcmp one
define i1 @i32_cast_cmp_one_int_n0_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp one float %f, -0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_ueq_int_0_uitofp(
; CHECK-NEXT: icmp eq i32 %i, 0
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_ueq_int_0_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp ueq float %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_ueq_int_n0_uitofp(
; CHECK: uitofp
; CHECK: fcmp ueq
define i1 @i32_cast_cmp_ueq_int_n0_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp ueq float %f, -0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_ueq_int_0_sitofp(
; CHECK-NEXT: icmp eq i32 %i, 0
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_ueq_int_0_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp ueq float %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_ueq_int_n0_sitofp(
; CHECK: sitofp
; CHECK: fcmp ueq
define i1 @i32_cast_cmp_ueq_int_n0_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp ueq float %f, -0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_une_int_0_uitofp(
; CHECK-NEXT: icmp ne i32 %i, 0
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_une_int_0_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp une float %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_une_int_n0_uitofp(
; CHECK: uitofp
; CHECK: fcmp une
define i1 @i32_cast_cmp_une_int_n0_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp une float %f, -0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_une_int_0_sitofp(
; CHECK-NEXT: icmp ne i32 %i, 0
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_une_int_0_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp une float %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_une_int_n0_sitofp(
; CHECK: sitofp
; CHECK: fcmp une
define i1 @i32_cast_cmp_une_int_n0_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp une float %f, -0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_ogt_int_0_uitofp(
; CHECK: icmp ne i32 %i, 0
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_ogt_int_0_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp ogt float %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_ogt_int_n0_uitofp(
; CHECK: uitofp
; CHECK: fcmp ogt
define i1 @i32_cast_cmp_ogt_int_n0_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp ogt float %f, -0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_ogt_int_0_sitofp(
; CHECK: icmp sgt i32 %i, 0
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_ogt_int_0_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp ogt float %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_ogt_int_n0_sitofp(
; CHECK: sitofp
; CHECK: fcmp ogt
define i1 @i32_cast_cmp_ogt_int_n0_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp ogt float %f, -0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_ole_int_0_uitofp(
; CHECK: icmp eq i32 %i, 0
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_ole_int_0_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp ole float %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_ole_int_0_sitofp(
; CHECK: icmp slt i32 %i, 1
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_ole_int_0_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp ole float %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_olt_int_0_uitofp(
; CHECK: ret i1 false
define i1 @i32_cast_cmp_olt_int_0_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp olt float %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_olt_int_0_sitofp(
; CHECK: icmp slt i32 %i, 0
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_olt_int_0_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp olt float %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i64_cast_cmp_oeq_int_0_uitofp(
; CHECK-NEXT: icmp eq i64 %i, 0
; CHECK-NEXT: ret
define i1 @i64_cast_cmp_oeq_int_0_uitofp(i64 %i) {
%f = uitofp i64 %i to float
%cmp = fcmp oeq float %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i64_cast_cmp_oeq_int_0_sitofp(
; CHECK-NEXT: icmp eq i64 %i, 0
; CHECK-NEXT: ret
define i1 @i64_cast_cmp_oeq_int_0_sitofp(i64 %i) {
%f = sitofp i64 %i to float
%cmp = fcmp oeq float %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i64_cast_cmp_oeq_int_0_uitofp_half(
; CHECK-NEXT: icmp eq i64 %i, 0
; CHECK-NEXT: ret
define i1 @i64_cast_cmp_oeq_int_0_uitofp_half(i64 %i) {
%f = uitofp i64 %i to half
%cmp = fcmp oeq half %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i64_cast_cmp_oeq_int_0_sitofp_half(
; CHECK-NEXT: icmp eq i64 %i, 0
; CHECK-NEXT: ret
define i1 @i64_cast_cmp_oeq_int_0_sitofp_half(i64 %i) {
%f = sitofp i64 %i to half
%cmp = fcmp oeq half %f, 0.0
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_int_0_uitofp_ppcf128(
; CHECK: uitofp
; CHECK: fcmp oeq
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_oeq_int_0_uitofp_ppcf128(i32 %i) {
%f = uitofp i32 %i to ppc_fp128
%cmp = fcmp oeq ppc_fp128 %f, 0xM00000000000000000000000000000000
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_int_i24max_uitofp(
; CHECK: uitofp
; CHECK: fcmp oeq
; XCHECK: icmp eq i32 %i, 16777215
; XCHECK-NEXT: ret
define i1 @i32_cast_cmp_oeq_int_i24max_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp oeq float %f, 0x416FFFFFE0000000
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_int_i24max_sitofp(
; CHECK: sitofp
; CHECK: fcmp oeq
; XCHECK: icmp eq i32 %i, 16777215
; XCHECK-NEXT: ret
define i1 @i32_cast_cmp_oeq_int_i24max_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp oeq float %f, 0x416FFFFFE0000000
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_int_i24maxp1_uitofp(
; CHECK: uitofp
; CHECK: fcmp oeq
; XCHECK: icmp eq i32 %i, 16777216
; XCHECK-NEXT: ret
define i1 @i32_cast_cmp_oeq_int_i24maxp1_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp oeq float %f, 0x4170000000000000
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_int_i24maxp1_sitofp(
; CHECK: sitofp
; CHECK: fcmp oeq
; XCHECK: icmp eq i32 %i, 16777216
; XCHECK-NEXT: ret
define i1 @i32_cast_cmp_oeq_int_i24maxp1_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp oeq float %f, 0x4170000000000000
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_int_i32umax_uitofp(
; CHECK: uitofp
; CHECK: fcmp oeq
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_oeq_int_i32umax_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp oeq float %f, 0x41F0000000000000
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_int_i32umax_sitofp(
; CHECK: sitofp
; CHECK: fcmp oeq
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_oeq_int_i32umax_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp oeq float %f, 0x41F0000000000000
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_int_i32imin_uitofp(
; CHECK: uitofp
; CHECK: fcmp oeq
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_oeq_int_i32imin_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp oeq float %f, 0xC1E0000000000000
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_int_i32imin_sitofp(
; CHECK: sitofp
; CHECK: fcmp oeq
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_oeq_int_i32imin_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp oeq float %f, 0xC1E0000000000000
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_int_i32imax_uitofp(
; CHECK: uitofp
; CHECK: fcmp oeq
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_oeq_int_i32imax_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp oeq float %f, 0x41E0000000000000
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_int_i32imax_sitofp(
; CHECK: sitofp
; CHECK: fcmp oeq
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_oeq_int_i32imax_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp oeq float %f, 0x41E0000000000000
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_int_negi32umax_uitofp(
; CHECK: uitofp
; CHECK: fcmp oeq
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_oeq_int_negi32umax_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp oeq float %f, 0xC1F0000000000000
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_int_negi32umax_sitofp(
; CHECK: sitofp
; CHECK: fcmp oeq
; CHECK-NEXT: ret
define i1 @i32_cast_cmp_oeq_int_negi32umax_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp oeq float %f, 0xC1F0000000000000
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_half_uitofp(
; CHECK: ret i1 false
define i1 @i32_cast_cmp_oeq_half_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp oeq float %f, 0.5
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_oeq_half_sitofp(
; CHECK: ret i1 false
define i1 @i32_cast_cmp_oeq_half_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp oeq float %f, 0.5
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_one_half_uitofp(
; CHECK: ret i1 true
define i1 @i32_cast_cmp_one_half_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp one float %f, 0.5
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_one_half_sitofp(
; CHECK: ret i1 true
define i1 @i32_cast_cmp_one_half_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp one float %f, 0.5
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_ueq_half_uitofp(
; CHECK: ret i1 false
define i1 @i32_cast_cmp_ueq_half_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp ueq float %f, 0.5
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_ueq_half_sitofp(
; CHECK: ret i1 false
define i1 @i32_cast_cmp_ueq_half_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp ueq float %f, 0.5
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_une_half_uitofp(
; CHECK: ret i1 true
define i1 @i32_cast_cmp_une_half_uitofp(i32 %i) {
%f = uitofp i32 %i to float
%cmp = fcmp une float %f, 0.5
ret i1 %cmp
}
; CHECK-LABEL: @i32_cast_cmp_une_half_sitofp(
; CHECK: ret i1 true
define i1 @i32_cast_cmp_une_half_sitofp(i32 %i) {
%f = sitofp i32 %i to float
%cmp = fcmp une float %f, 0.5
ret i1 %cmp
}
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