183 lines
5.1 KiB
LLVM
183 lines
5.1 KiB
LLVM
; RUN: opt -S -instcombine < %s | FileCheck %s
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; CHECK-LABEL: @t1
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; CHECK-NEXT: fcmp oge float %a, 5.000000e+00
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; CHECK-NEXT: select i1 %.inv, float 5.000000e+00, float %a
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; CHECK-NEXT: fpext float %1 to double
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define double @t1(float %a) {
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; This is the canonical form for a type-changing min/max.
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%1 = fcmp ult float %a, 5.0
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%2 = select i1 %1, float %a, float 5.0
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%3 = fpext float %2 to double
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ret double %3
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}
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; CHECK-LABEL: @t2
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; CHECK-NEXT: fcmp oge float %a, 5.000000e+00
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; CHECK-NEXT: select i1 %.inv, float 5.000000e+00, float %a
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; CHECK-NEXT: fpext float %1 to double
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define double @t2(float %a) {
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; Check this is converted into canonical form, as above.
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%1 = fcmp ult float %a, 5.0
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%2 = fpext float %a to double
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%3 = select i1 %1, double %2, double 5.0
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ret double %3
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}
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; CHECK-LABEL: @t4
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; CHECK-NEXT: fcmp oge double %a, 5.000000e+00
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; CHECK-NEXT: select i1 %.inv, double 5.000000e+00, double %a
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; CHECK-NEXT: fptrunc double %1 to float
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define float @t4(double %a) {
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; Same again, with trunc.
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%1 = fcmp ult double %a, 5.0
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%2 = fptrunc double %a to float
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%3 = select i1 %1, float %2, float 5.0
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ret float %3
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}
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; CHECK-LABEL: @t5
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; CHECK-NEXT: fcmp ult float %a, 5.000000e+00
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; CHECK-NEXT: fpext float %a to double
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; CHECK-NEXT: select i1 %1, double %2, double 5.001
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define double @t5(float %a) {
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; different values, should not be converted.
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%1 = fcmp ult float %a, 5.0
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%2 = fpext float %a to double
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%3 = select i1 %1, double %2, double 5.001
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ret double %3
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}
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; CHECK-LABEL: @t6
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; CHECK-NEXT: fcmp ult float %a, -0.0
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; CHECK-NEXT: fpext float %a to double
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; CHECK-NEXT: select i1 %1, double %2, double 0.0
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define double @t6(float %a) {
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; Signed zero, should not be converted
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%1 = fcmp ult float %a, -0.0
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%2 = fpext float %a to double
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%3 = select i1 %1, double %2, double 0.0
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ret double %3
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}
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; CHECK-LABEL: @t7
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; CHECK-NEXT: fcmp ult float %a, 0.0
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; CHECK-NEXT: fpext float %a to double
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; CHECK-NEXT: select i1 %1, double %2, double -0.0
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define double @t7(float %a) {
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; Signed zero, should not be converted
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%1 = fcmp ult float %a, 0.0
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%2 = fpext float %a to double
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%3 = select i1 %1, double %2, double -0.0
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ret double %3
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}
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; CHECK-LABEL: @t8
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; CHECK-NEXT: fcmp oge float %a, 5.000000e+00
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; CHECK-NEXT: select i1 %.inv, float 5.000000e+00, float %a
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; CHECK-NEXT: fptoui float %1 to i64
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define i64 @t8(float %a) {
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%1 = fcmp ult float %a, 5.0
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%2 = fptoui float %a to i64
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%3 = select i1 %1, i64 %2, i64 5
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ret i64 %3
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}
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; CHECK-LABEL: @t9
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; CHECK-NEXT: fcmp oge float %a, 0.000000e+00
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; CHECK-NEXT: select i1 %.inv, float 0.000000e+00, float %a
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; CHECK-NEXT: fptosi float %1 to i8
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define i8 @t9(float %a) {
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%1 = fcmp ult float %a, 0.0
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%2 = fptosi float %a to i8
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%3 = select i1 %1, i8 %2, i8 0
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ret i8 %3
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}
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; CHECK-LABEL: @t11
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; CHECK-NEXT: fcmp fast oge float %b, %a
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; CHECK-NEXT: select i1 %.inv, float %a, float %b
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; CHECK-NEXT: fptosi
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define i8 @t11(float %a, float %b) {
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; Either operand could be NaN, but fast modifier applied.
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%1 = fcmp fast ult float %b, %a
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%2 = fptosi float %a to i8
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%3 = fptosi float %b to i8
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%4 = select i1 %1, i8 %3, i8 %2
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ret i8 %4
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}
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; CHECK-LABEL: @t12
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; CHECK-NEXT: fcmp nnan oge float %b, %a
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; CHECK-NEXT: select i1 %.inv, float %a, float %b
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; CHECK-NEXT: fptosi float %.v to i8
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define i8 @t12(float %a, float %b) {
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; Either operand could be NaN, but nnan modifier applied.
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%1 = fcmp nnan ult float %b, %a
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%2 = fptosi float %a to i8
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%3 = fptosi float %b to i8
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%4 = select i1 %1, i8 %3, i8 %2
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ret i8 %4
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}
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; CHECK-LABEL: @t13
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; CHECK-NEXT: fcmp ult float %a, 1.500000e+00
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; CHECK-NEXT: fptosi float %a to i8
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; CHECK-NEXT: select i1 %1, i8 %2, i8 1
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define i8 @t13(float %a) {
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; Float and int values do not match.
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%1 = fcmp ult float %a, 1.5
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%2 = fptosi float %a to i8
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%3 = select i1 %1, i8 %2, i8 1
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ret i8 %3
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}
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; CHECK-LABEL: @t14
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; CHECK-NEXT: fcmp ule float %a, 0.000000e+00
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; CHECK-NEXT: fptosi float %a to i8
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; CHECK-NEXT: select i1 %1, i8 %2, i8 0
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define i8 @t14(float %a) {
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; <= comparison, where %a could be -0.0. Not safe.
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%1 = fcmp ule float %a, 0.0
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%2 = fptosi float %a to i8
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%3 = select i1 %1, i8 %2, i8 0
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ret i8 %3
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}
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; CHECK-LABEL: @t15
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; CHECK-NEXT: fcmp nsz oge float %a, 0.000000e+00
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; CHECK-NEXT: select i1 %.inv, float 0.000000e+00, float %a
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; CHECK-NEXT: fptosi float %1 to i8
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define i8 @t15(float %a) {
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%1 = fcmp nsz ule float %a, 0.0
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%2 = fptosi float %a to i8
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%3 = select i1 %1, i8 %2, i8 0
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ret i8 %3
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}
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; CHECK-LABEL: @t16
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; CHECK: %[[cmp:.*]] = icmp sgt i32 %x, 0
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; CHECK: %[[cst:.*]] = sitofp i32 %x to double
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; CHECK: %[[sel:.*]] = select i1 %[[cmp]], double %[[cst]], double 5.000000e-01
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; CHECK: ret double %[[sel]]
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define double @t16(i32 %x) {
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entry:
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%cmp = icmp sgt i32 %x, 0
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%cst = sitofp i32 %x to double
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%sel = select i1 %cmp, double %cst, double 5.000000e-01
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ret double %sel
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}
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; CHECK-LABEL: @t17
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; CHECK: %[[cmp:.*]] = icmp sgt i32 %x, 2
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; CHECK: %[[sel:.*]] = select i1 %[[cmp]], i32 %x, i32 2
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; CHECK: %[[cst:.*]] = sitofp i32 %[[sel]] to double
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; CHECK: ret double %[[cst]]
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define double @t17(i32 %x) {
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entry:
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%cmp = icmp sgt i32 %x, 2
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%cst = sitofp i32 %x to double
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%sel = select i1 %cmp, double %cst, double 2.0
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ret double %sel
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}
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