[IR] Remove unsafe-fp-math attribute support (#164534)

Now this attribute is no longer recognized by backends, remove it.

Author: paperchalice

llvm/include/llvm/IR/Attributes.td

@@ -410,7 +410,6 @@ def LessPreciseFPMAD : StrBoolAttr<"less-precise-fpmad">;
 def NoInfsFPMath : StrBoolAttr<"no-infs-fp-math">;
 def NoNansFPMath : StrBoolAttr<"no-nans-fp-math">;
 def NoSignedZerosFPMath : StrBoolAttr<"no-signed-zeros-fp-math">;
-def UnsafeFPMath : StrBoolAttr<"unsafe-fp-math">;
 def NoJumpTables : StrBoolAttr<"no-jump-tables">;
 def NoInlineLineTables : StrBoolAttr<"no-inline-line-tables">;
 def ProfileSampleAccurate : StrBoolAttr<"profile-sample-accurate">;
@@ -474,7 +473,6 @@ def : MergeRule<"setAND<LessPreciseFPMADAttr>">;
 def : MergeRule<"setAND<NoInfsFPMathAttr>">;
 def : MergeRule<"setAND<NoNansFPMathAttr>">;
 def : MergeRule<"setAND<NoSignedZerosFPMathAttr>">;
-def : MergeRule<"setAND<UnsafeFPMathAttr>">;
 def : MergeRule<"setOR<NoImplicitFloatAttr>">;
 def : MergeRule<"setOR<NoJumpTablesAttr>">;
 def : MergeRule<"setOR<ProfileSampleAccurateAttr>">;

llvm/test/Transforms/IROutliner/outlining-compatible-and-attribute-transfer.ll

@@ -5,7 +5,7 @@
 ; attributes that should be transferred only if it is on all of the regions.
 
 ; This includes the attributes, no-nans-fp-math,
-; no-signed-zeros-fp-math, less-precise-fpmad, unsafe-fp-math, and
+; no-signed-zeros-fp-math, less-precise-fpmad, and
 ; no-infs-fp-math.  Only when each instance of similarity has these attributes
 ; can we say that the outlined function can have these attributes since that
 ; is the more general case for these attributes.
@@ -101,7 +101,7 @@ entry:
 }
 
 attributes #0 = { "no-nans-fp-math"="true" "no-signed-zeros-fp-math"="true" "less-precise-fpmad"="true"
-"unsafe-fp-math"="true" "no-infs-fp-math"="true"}
+"no-infs-fp-math"="true"}
 
 ; CHECK: define internal void @outlined_ir_func_0(ptr [[ARG0:%.*]], ptr [[ARG1:%.*]], ptr [[ARG2:%.*]]) [[ATTR1:#[0-9]+]] {
 ; CHECK: entry_to_outline:
@@ -122,5 +122,5 @@ attributes #0 = { "no-nans-fp-math"="true" "no-signed-zeros-fp-math"="true" "les
 ; CHECK-NEXT:    [[CL:%.*]] = load i32, ptr [[ARG2]], align 4
 
 
-; CHECK: attributes [[ATTR1]] =   { minsize optsize "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "unsafe-fp-math"="false" }
-; CHECK: attributes [[ATTR]] = { minsize optsize "less-precise-fpmad"="true" "no-infs-fp-math"="true" "no-nans-fp-math"="true" "no-signed-zeros-fp-math"="true" "unsafe-fp-math"="true" }
+; CHECK: attributes [[ATTR1]] =   { minsize optsize "less-precise-fpmad"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" }
+; CHECK: attributes [[ATTR]] = { minsize optsize "less-precise-fpmad"="true" "no-infs-fp-math"="true" "no-nans-fp-math"="true" "no-signed-zeros-fp-math"="true" }

llvm/test/Transforms/Inline/attributes.ll

@@ -601,46 +601,6 @@ define i32 @test_no-signed-zeros-fp-math3(i32 %i) "no-signed-zeros-fp-math"="tru
 ; CHECK-NEXT: ret i32
 }
 
-define i32 @unsafe-fp-math_callee0(i32 %i) "unsafe-fp-math"="false" {
-  ret i32 %i
-; CHECK: @unsafe-fp-math_callee0(i32 %i) [[UNSAFE_FPMATH_FALSE:#[0-9]+]] {
-; CHECK-NEXT: ret i32
-}
-
-define i32 @unsafe-fp-math_callee1(i32 %i) "unsafe-fp-math"="true" {
-  ret i32 %i
-; CHECK: @unsafe-fp-math_callee1(i32 %i) [[UNSAFE_FPMATH_TRUE:#[0-9]+]] {
-; CHECK-NEXT: ret i32
-}
-
-define i32 @test_unsafe-fp-math0(i32 %i) "unsafe-fp-math"="false" {
-  %1 = call i32 @unsafe-fp-math_callee0(i32 %i)
-  ret i32 %1
-; CHECK: @test_unsafe-fp-math0(i32 %i) [[UNSAFE_FPMATH_FALSE]] {
-; CHECK-NEXT: ret i32
-}
-
-define i32 @test_unsafe-fp-math1(i32 %i) "unsafe-fp-math"="false" {
-  %1 = call i32 @unsafe-fp-math_callee1(i32 %i)
-  ret i32 %1
-; CHECK: @test_unsafe-fp-math1(i32 %i) [[UNSAFE_FPMATH_FALSE]] {
-; CHECK-NEXT: ret i32
-}
-
-define i32 @test_unsafe-fp-math2(i32 %i) "unsafe-fp-math"="true" {
-  %1 = call i32 @unsafe-fp-math_callee0(i32 %i)
-  ret i32 %1
-; CHECK: @test_unsafe-fp-math2(i32 %i) [[UNSAFE_FPMATH_FALSE]] {
-; CHECK-NEXT: ret i32
-}
-
-define i32 @test_unsafe-fp-math3(i32 %i) "unsafe-fp-math"="true" {
-  %1 = call i32 @unsafe-fp-math_callee1(i32 %i)
-  ret i32 %1
-; CHECK: @test_unsafe-fp-math3(i32 %i) [[UNSAFE_FPMATH_TRUE]] {
-; CHECK-NEXT: ret i32
-}
-
 ; Test that fn_ret_thunk_extern has no CompatRule; inlining is permitted.
 ; Test that fn_ret_thunk_extern has no MergeRule; fn_ret_thunk_extern is not
 ; propagated or dropped on the caller after inlining.
@@ -693,6 +653,4 @@ define i32 @loader_replaceable_caller() {
 ; CHECK: attributes [[NO_NANS_FPMATH_TRUE]] = { "no-nans-fp-math"="true" }
 ; CHECK: attributes [[NO_SIGNED_ZEROS_FPMATH_FALSE]] = { "no-signed-zeros-fp-math"="false" }
 ; CHECK: attributes [[NO_SIGNED_ZEROS_FPMATH_TRUE]] = { "no-signed-zeros-fp-math"="true" }
-; CHECK: attributes [[UNSAFE_FPMATH_FALSE]] = { "unsafe-fp-math"="false" }
-; CHECK: attributes [[UNSAFE_FPMATH_TRUE]] = { "unsafe-fp-math"="true" }
 ; CHECK: attributes [[FNRETTHUNK_EXTERN]] = { fn_ret_thunk_extern }