[IR] allow fast-math-flags on select of FP values

This is a minimal start to correcting a problem most directly discussed in PR38086:
https://bugs.llvm.org/show_bug.cgi?id=38086

We have been hacking around a limitation for FP select patterns by using the
fast-math-flags on the condition of the select rather than the select itself.
This patch just allows FMF to appear with the 'select' opcode. No changes are
needed to "FPMathOperator" because it already includes select-of-FP because
that definition is based on the (return) value type.

Once we have this ability, we can start correcting and adding IR transforms
to use the FMF on a 'select' instruction. The instcombine and vectorizer test
diffs only show that the IRBuilder change is behaving as expected by applying
an FMF guard value to 'select'.

For reference:
rL241901 - allowed FMF with fcmp
rL255555 - allowed FMF with FP calls

Differential Revision: https://reviews.llvm.org/D61917

llvm-svn: 361401

6 files changed, 61 insertions, 33 deletions

diff --git a/llvm/test/Bitcode/compatibility.ll b/llvm/test/Bitcode/compatibility.ll
index 95cd49f8156..a1474df6d94 100644
--- a/llvm/test/Bitcode/compatibility.ll
+++ b/llvm/test/Bitcode/compatibility.ll
@@ -815,6 +815,34 @@ define void @fastmathflags_binops(float %op1, float %op2) {
   ret void
 }
 
+define void @fastmathflags_select(i1 %cond, float %op1, float %op2) {
+  %f.nnan = select nnan i1 %cond, float %op1, float %op2
+  ; CHECK: %f.nnan = select nnan i1 %cond, float %op1, float %op2
+  %f.ninf = select ninf i1 %cond, float %op1, float %op2
+  ; CHECK: %f.ninf = select ninf i1 %cond, float %op1, float %op2
+  %f.nsz = select nsz i1 %cond, float %op1, float %op2
+  ; CHECK: %f.nsz = select nsz i1 %cond, float %op1, float %op2
+  %f.arcp = select arcp i1 %cond, float %op1, float %op2
+  ; CHECK: %f.arcp = select arcp i1 %cond, float %op1, float %op2
+  %f.contract = select contract i1 %cond, float %op1, float %op2
+  ; CHECK: %f.contract = select contract i1 %cond, float %op1, float %op2
+  %f.afn = select afn i1 %cond, float %op1, float %op2
+  ; CHECK: %f.afn = select afn i1 %cond, float %op1, float %op2
+  %f.reassoc = select reassoc i1 %cond, float %op1, float %op2
+  ; CHECK: %f.reassoc = select reassoc i1 %cond, float %op1, float %op2
+  %f.fast = select fast i1 %cond, float %op1, float %op2
+  ; CHECK: %f.fast = select fast i1 %cond, float %op1, float %op2
+  ret void
+}
+
+define void @fastmathflags_vector_select(<2 x i1> %cond, <2 x double> %op1, <2 x double> %op2) {
+  %f.nnan.nsz = select nnan nsz <2 x i1> %cond, <2 x double> %op1, <2 x double> %op2
+  ; CHECK: %f.nnan.nsz = select nnan nsz <2 x i1> %cond, <2 x double> %op1, <2 x double> %op2
+  %f.fast = select fast <2 x i1> %cond, <2 x double> %op1, <2 x double> %op2
+  ; CHECK: %f.fast = select fast <2 x i1> %cond, <2 x double> %op1, <2 x double> %op2
+  ret void
+}
+
 ; Check various fast math flags and floating-point types on calls.
 
 declare float @fmf1()
diff --git a/llvm/test/CodeGen/Generic/expand-experimental-reductions.ll b/llvm/test/CodeGen/Generic/expand-experimental-reductions.ll
index 05fa6e324ac..063c95e9fb9 100644
--- a/llvm/test/CodeGen/Generic/expand-experimental-reductions.ll
+++ b/llvm/test/CodeGen/Generic/expand-experimental-reductions.ll
@@ -277,7 +277,7 @@ define double @fmax_f64(<2 x double> %vec) {
 ; CHECK-NEXT:  entry:
 ; CHECK-NEXT:    [[RDX_SHUF:%.*]] = shufflevector <2 x double> [[VEC:%.*]], <2 x double> undef, <2 x i32> <i32 1, i32 undef>
 ; CHECK-NEXT:    [[RDX_MINMAX_CMP:%.*]] = fcmp fast ogt <2 x double> [[VEC]], [[RDX_SHUF]]
-; CHECK-NEXT:    [[RDX_MINMAX_SELECT:%.*]] = select <2 x i1> [[RDX_MINMAX_CMP]], <2 x double> [[VEC]], <2 x double> [[RDX_SHUF]]
+; CHECK-NEXT:    [[RDX_MINMAX_SELECT:%.*]] = select fast <2 x i1> [[RDX_MINMAX_CMP]], <2 x double> [[VEC]], <2 x double> [[RDX_SHUF]]
 ; CHECK-NEXT:    [[TMP0:%.*]] = extractelement <2 x double> [[RDX_MINMAX_SELECT]], i32 0
 ; CHECK-NEXT:    ret double [[TMP0]]
 ;
@@ -291,7 +291,7 @@ define double @fmin_f64(<2 x double> %vec) {
 ; CHECK-NEXT:  entry:
 ; CHECK-NEXT:    [[RDX_SHUF:%.*]] = shufflevector <2 x double> [[VEC:%.*]], <2 x double> undef, <2 x i32> <i32 1, i32 undef>
 ; CHECK-NEXT:    [[RDX_MINMAX_CMP:%.*]] = fcmp fast olt <2 x double> [[VEC]], [[RDX_SHUF]]
-; CHECK-NEXT:    [[RDX_MINMAX_SELECT:%.*]] = select <2 x i1> [[RDX_MINMAX_CMP]], <2 x double> [[VEC]], <2 x double> [[RDX_SHUF]]
+; CHECK-NEXT:    [[RDX_MINMAX_SELECT:%.*]] = select fast <2 x i1> [[RDX_MINMAX_CMP]], <2 x double> [[VEC]], <2 x double> [[RDX_SHUF]]
 ; CHECK-NEXT:    [[TMP0:%.*]] = extractelement <2 x double> [[RDX_MINMAX_SELECT]], i32 0
 ; CHECK-NEXT:    ret double [[TMP0]]
 ;
diff --git a/llvm/test/Transforms/InstCombine/fast-math.ll b/llvm/test/Transforms/InstCombine/fast-math.ll
index b5173cc467c..3e7af3e7838 100644
--- a/llvm/test/Transforms/InstCombine/fast-math.ll
+++ b/llvm/test/Transforms/InstCombine/fast-math.ll
@@ -820,7 +820,7 @@ declare fp128 @fminl(fp128, fp128)
 define float @max1(float %a, float %b) {
 ; CHECK-LABEL: @max1(
 ; CHECK-NEXT:    [[TMP1:%.*]] = fcmp fast ogt float [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], float [[A]], float [[B]]
+; CHECK-NEXT:    [[TMP2:%.*]] = select fast i1 [[TMP1]], float [[A]], float [[B]]
 ; CHECK-NEXT:    ret float [[TMP2]]
 ;
   %c = fpext float %a to double
@@ -833,7 +833,7 @@ define float @max1(float %a, float %b) {
 define float @max2(float %a, float %b) {
 ; CHECK-LABEL: @max2(
 ; CHECK-NEXT:    [[TMP1:%.*]] = fcmp nnan nsz ogt float [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], float [[A]], float [[B]]
+; CHECK-NEXT:    [[TMP2:%.*]] = select nnan nsz i1 [[TMP1]], float [[A]], float [[B]]
 ; CHECK-NEXT:    ret float [[TMP2]]
 ;
   %c = call nnan float @fmaxf(float %a, float %b)
@@ -844,7 +844,7 @@ define float @max2(float %a, float %b) {
 define double @max3(double %a, double %b) {
 ; CHECK-LABEL: @max3(
 ; CHECK-NEXT:    [[TMP1:%.*]] = fcmp fast ogt double [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], double [[A]], double [[B]]
+; CHECK-NEXT:    [[TMP2:%.*]] = select fast i1 [[TMP1]], double [[A]], double [[B]]
 ; CHECK-NEXT:    ret double [[TMP2]]
 ;
   %c = call fast double @fmax(double %a, double %b)
@@ -854,7 +854,7 @@ define double @max3(double %a, double %b) {
 define fp128 @max4(fp128 %a, fp128 %b) {
 ; CHECK-LABEL: @max4(
 ; CHECK-NEXT:    [[TMP1:%.*]] = fcmp nnan nsz ogt fp128 [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], fp128 [[A]], fp128 [[B]]
+; CHECK-NEXT:    [[TMP2:%.*]] = select nnan nsz i1 [[TMP1]], fp128 [[A]], fp128 [[B]]
 ; CHECK-NEXT:    ret fp128 [[TMP2]]
 ;
   %c = call nnan fp128 @fmaxl(fp128 %a, fp128 %b)
@@ -865,7 +865,7 @@ define fp128 @max4(fp128 %a, fp128 %b) {
 define float @min1(float %a, float %b) {
 ; CHECK-LABEL: @min1(
 ; CHECK-NEXT:    [[TMP1:%.*]] = fcmp nnan nsz olt float [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], float [[A]], float [[B]]
+; CHECK-NEXT:    [[TMP2:%.*]] = select nnan nsz i1 [[TMP1]], float [[A]], float [[B]]
 ; CHECK-NEXT:    ret float [[TMP2]]
 ;
   %c = fpext float %a to double
@@ -878,7 +878,7 @@ define float @min1(float %a, float %b) {
 define float @min2(float %a, float %b) {
 ; CHECK-LABEL: @min2(
 ; CHECK-NEXT:    [[TMP1:%.*]] = fcmp fast olt float [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], float [[A]], float [[B]]
+; CHECK-NEXT:    [[TMP2:%.*]] = select fast i1 [[TMP1]], float [[A]], float [[B]]
 ; CHECK-NEXT:    ret float [[TMP2]]
 ;
   %c = call fast float @fminf(float %a, float %b)
@@ -888,7 +888,7 @@ define float @min2(float %a, float %b) {
 define double @min3(double %a, double %b) {
 ; CHECK-LABEL: @min3(
 ; CHECK-NEXT:    [[TMP1:%.*]] = fcmp nnan nsz olt double [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], double [[A]], double [[B]]
+; CHECK-NEXT:    [[TMP2:%.*]] = select nnan nsz i1 [[TMP1]], double [[A]], double [[B]]
 ; CHECK-NEXT:    ret double [[TMP2]]
 ;
   %c = call nnan double @fmin(double %a, double %b)
@@ -898,7 +898,7 @@ define double @min3(double %a, double %b) {
 define fp128 @min4(fp128 %a, fp128 %b) {
 ; CHECK-LABEL: @min4(
 ; CHECK-NEXT:    [[TMP1:%.*]] = fcmp fast olt fp128 [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[TMP2:%.*]] = select i1 [[TMP1]], fp128 [[A]], fp128 [[B]]
+; CHECK-NEXT:    [[TMP2:%.*]] = select fast i1 [[TMP1]], fp128 [[A]], fp128 [[B]]
 ; CHECK-NEXT:    ret fp128 [[TMP2]]
 ;
   %c = call fast fp128 @fminl(fp128 %a, fp128 %b)
diff --git a/llvm/test/Transforms/InstCombine/pow-sqrt.ll b/llvm/test/Transforms/InstCombine/pow-sqrt.ll
index 9fcca83c21f..c87eac70532 100644
--- a/llvm/test/Transforms/InstCombine/pow-sqrt.ll
+++ b/llvm/test/Transforms/InstCombine/pow-sqrt.ll
@@ -36,7 +36,7 @@ define double @pow_libcall_half_approx(double %x) {
 ; CHECK-NEXT:    [[SQRT:%.*]] = call afn double @sqrt(double [[X:%.*]])
 ; CHECK-NEXT:    [[ABS:%.*]] = call afn double @llvm.fabs.f64(double [[SQRT]])
 ; CHECK-NEXT:    [[ISINF:%.*]] = fcmp afn oeq double [[X]], 0xFFF0000000000000
-; CHECK-NEXT:    [[TMP1:%.*]] = select i1 [[ISINF]], double 0x7FF0000000000000, double [[ABS]]
+; CHECK-NEXT:    [[TMP1:%.*]] = select afn i1 [[ISINF]], double 0x7FF0000000000000, double [[ABS]]
 ; CHECK-NEXT:    ret double [[TMP1]]
 ;
   %pow = call afn double @pow(double %x, double 5.0e-01)
@@ -48,7 +48,7 @@ define <2 x double> @pow_intrinsic_half_approx(<2 x double> %x) {
 ; CHECK-NEXT:    [[SQRT:%.*]] = call afn <2 x double> @llvm.sqrt.v2f64(<2 x double> [[X:%.*]])
 ; CHECK-NEXT:    [[ABS:%.*]] = call afn <2 x double> @llvm.fabs.v2f64(<2 x double> [[SQRT]])
 ; CHECK-NEXT:    [[ISINF:%.*]] = fcmp afn oeq <2 x double> [[X]], <double 0xFFF0000000000000, double 0xFFF0000000000000>
-; CHECK-NEXT:    [[TMP1:%.*]] = select <2 x i1> [[ISINF]], <2 x double> <double 0x7FF0000000000000, double 0x7FF0000000000000>, <2 x double> [[ABS]]
+; CHECK-NEXT:    [[TMP1:%.*]] = select afn <2 x i1> [[ISINF]], <2 x double> <double 0x7FF0000000000000, double 0x7FF0000000000000>, <2 x double> [[ABS]]
 ; CHECK-NEXT:    ret <2 x double> [[TMP1]]
 ;
   %pow = call afn <2 x double> @llvm.pow.v2f64(<2 x double> %x, <2 x double> <double 5.0e-01, double 5.0e-01>)
@@ -92,7 +92,7 @@ define double @pow_libcall_half_nsz(double %x) {
 ; CHECK-LABEL: @pow_libcall_half_nsz(
 ; CHECK-NEXT:    [[SQRT:%.*]] = call nsz double @sqrt(double [[X:%.*]])
 ; CHECK-NEXT:    [[ISINF:%.*]] = fcmp nsz oeq double [[X]], 0xFFF0000000000000
-; CHECK-NEXT:    [[TMP1:%.*]] = select i1 [[ISINF]], double 0x7FF0000000000000, double [[SQRT]]
+; CHECK-NEXT:    [[TMP1:%.*]] = select nsz i1 [[ISINF]], double 0x7FF0000000000000, double [[SQRT]]
 ; CHECK-NEXT:    ret double [[TMP1]]
 ;
   %pow = call nsz double @pow(double %x, double 5.0e-01)
@@ -103,7 +103,7 @@ define double @pow_intrinsic_half_nsz(double %x) {
 ; CHECK-LABEL: @pow_intrinsic_half_nsz(
 ; CHECK-NEXT:    [[SQRT:%.*]] = call nsz double @llvm.sqrt.f64(double [[X:%.*]])
 ; CHECK-NEXT:    [[ISINF:%.*]] = fcmp nsz oeq double [[X]], 0xFFF0000000000000
-; CHECK-NEXT:    [[TMP1:%.*]] = select i1 [[ISINF]], double 0x7FF0000000000000, double [[SQRT]]
+; CHECK-NEXT:    [[TMP1:%.*]] = select nsz i1 [[ISINF]], double 0x7FF0000000000000, double [[SQRT]]
 ; CHECK-NEXT:    ret double [[TMP1]]
 ;
   %pow = call nsz double @llvm.pow.f64(double %x, double 5.0e-01)
diff --git a/llvm/test/Transforms/LoopVectorize/float-minmax-instruction-flag.ll b/llvm/test/Transforms/LoopVectorize/float-minmax-instruction-flag.ll
index c65e0dbf9e5..8b86a71b85e 100644
--- a/llvm/test/Transforms/LoopVectorize/float-minmax-instruction-flag.ll
+++ b/llvm/test/Transforms/LoopVectorize/float-minmax-instruction-flag.ll
@@ -74,10 +74,10 @@ define float @minloopattr(float* nocapture readonly %arg) #0 {
 ; CHECK:       middle.block:
 ; CHECK-NEXT:    [[RDX_SHUF:%.*]] = shufflevector <4 x float> [[TMP6]], <4 x float> undef, <4 x i32> <i32 2, i32 3, i32 undef, i32 undef>
 ; CHECK-NEXT:    [[RDX_MINMAX_CMP:%.*]] = fcmp fast olt <4 x float> [[TMP6]], [[RDX_SHUF]]
-; CHECK-NEXT:    [[RDX_MINMAX_SELECT:%.*]] = select <4 x i1> [[RDX_MINMAX_CMP]], <4 x float> [[TMP6]], <4 x float> [[RDX_SHUF]]
+; CHECK-NEXT:    [[RDX_MINMAX_SELECT:%.*]] = select fast <4 x i1> [[RDX_MINMAX_CMP]], <4 x float> [[TMP6]], <4 x float> [[RDX_SHUF]]
 ; CHECK-NEXT:    [[RDX_SHUF1:%.*]] = shufflevector <4 x float> [[RDX_MINMAX_SELECT]], <4 x float> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef>
 ; CHECK-NEXT:    [[RDX_MINMAX_CMP2:%.*]] = fcmp fast olt <4 x float> [[RDX_MINMAX_SELECT]], [[RDX_SHUF1]]
-; CHECK-NEXT:    [[RDX_MINMAX_SELECT3:%.*]] = select <4 x i1> [[RDX_MINMAX_CMP2]], <4 x float> [[RDX_MINMAX_SELECT]], <4 x float> [[RDX_SHUF1]]
+; CHECK-NEXT:    [[RDX_MINMAX_SELECT3:%.*]] = select fast <4 x i1> [[RDX_MINMAX_CMP2]], <4 x float> [[RDX_MINMAX_SELECT]], <4 x float> [[RDX_SHUF1]]
 ; CHECK-NEXT:    [[TMP8:%.*]] = extractelement <4 x float> [[RDX_MINMAX_SELECT3]], i32 0
 ; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 65536, 65536
 ; CHECK-NEXT:    br i1 [[CMP_N]], label [[OUT:%.*]], label [[SCALAR_PH]]
diff --git a/llvm/test/Transforms/LoopVectorize/minmax_reduction.ll b/llvm/test/Transforms/LoopVectorize/minmax_reduction.ll
index 188700d66d8..fc2f8dcec2f 100644
--- a/llvm/test/Transforms/LoopVectorize/minmax_reduction.ll
+++ b/llvm/test/Transforms/LoopVectorize/minmax_reduction.ll
@@ -416,7 +416,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast ogt <2 x float>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define float @max_red_float(float %max) #0 {
 entry:
@@ -442,7 +442,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast ogt <2 x float>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define float @max_red_float_ge(float %max) #0 {
 entry:
@@ -468,7 +468,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast ogt <2 x float>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define float @inverted_max_red_float(float %max) #0 {
 entry:
@@ -494,7 +494,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast ogt <2 x float>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define float @inverted_max_red_float_le(float %max) #0 {
 entry:
@@ -520,7 +520,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast ogt <2 x float>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define float @unordered_max_red_float(float %max) #0 {
 entry:
@@ -546,7 +546,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast ogt <2 x float>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define float @unordered_max_red_float_ge(float %max) #0 {
 entry:
@@ -572,7 +572,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast ogt <2 x float>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define float @inverted_unordered_max_red_float(float %max) #0 {
 entry:
@@ -598,7 +598,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast ogt <2 x float>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define float @inverted_unordered_max_red_float_le(float %max) #0 {
 entry:
@@ -627,7 +627,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast olt <2 x float>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define float @min_red_float(float %min) #0 {
 entry:
@@ -653,7 +653,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast olt <2 x float>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define float @min_red_float_le(float %min) #0 {
 entry:
@@ -679,7 +679,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast olt <2 x float>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define float @inverted_min_red_float(float %min) #0 {
 entry:
@@ -705,7 +705,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast olt <2 x float>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define float @inverted_min_red_float_ge(float %min) #0 {
 entry:
@@ -731,7 +731,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast olt <2 x float>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define float @unordered_min_red_float(float %min) #0 {
 entry:
@@ -757,7 +757,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast olt <2 x float>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define float @unordered_min_red_float_le(float %min) #0 {
 entry:
@@ -783,7 +783,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast olt <2 x float>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define float @inverted_unordered_min_red_float(float %min) #0 {
 entry:
@@ -809,7 +809,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast olt <2 x float>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define float @inverted_unordered_min_red_float_ge(float %min) #0 {
 entry:
@@ -836,7 +836,7 @@ for.end:
 ; CHECK: select <2 x i1>
 ; CHECK: middle.block
 ; CHECK: fcmp fast olt <2 x double>
-; CHECK: select <2 x i1>
+; CHECK: select fast <2 x i1>
 
 define double @min_red_double(double %min) #0 {
 entry: