[X86][NFC] Added/Updated SQRT function testcases (#132205)

- Added test for x86_fp80 type for SQRT.
- Added global-isel runs as precommit testing for SQRT.

Author: JaydeepChauhan14

llvm/test/CodeGen/X86/isel-sqrt.ll

@@ -0,0 +1,74 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=x86_64-apple-darwin -mattr=-avx,+sse2                       | FileCheck %s --check-prefixes=X64,SSE2
+; RUN: llc < %s -mtriple=x86_64-apple-darwin -mattr=-avx,+sse2 -fast-isel            | FileCheck %s --check-prefixes=X64,SSE2
+; RUN: llc < %s -mtriple=x86_64-apple-darwin -mattr=-avx,+sse2 -global-isel -global-isel-abort=2 | FileCheck %s --check-prefixes=X64,SSE2
+; RUN: llc < %s -mtriple=x86_64-apple-darwin -mattr=-avx2,+avx                       | FileCheck %s --check-prefixes=X64,AVX
+; RUN: llc < %s -mtriple=x86_64-apple-darwin -mattr=-avx2,+avx -fast-isel            | FileCheck %s --check-prefixes=X64,AVX
+; RUN: llc < %s -mtriple=x86_64-apple-darwin -mattr=-avx2,+avx -global-isel -global-isel-abort=2 | FileCheck %s --check-prefixes=X64,AVX
+; RUN: llc < %s -mtriple=i686-linux-gnu -global-isel=0 -fast-isel=0                  | FileCheck %s --check-prefixes=X86,SDAG-X86
+; RUN: llc < %s -mtriple=i686-linux-gnu -fast-isel                                   | FileCheck %s --check-prefixes=X86,FASTISEL-X86
+; RUN: llc < %s -mtriple=i686-linux-gnu -global-isel -global-isel-abort=2            | FileCheck %s --check-prefixes=X86,GISEL-X86
+
+define float @test_sqrt_f32(float %a) {
+; SSE2-LABEL: test_sqrt_f32:
+; SSE2:       ## %bb.0:
+; SSE2-NEXT:    sqrtss %xmm0, %xmm0
+; SSE2-NEXT:    retq
+;
+; AVX-LABEL: test_sqrt_f32:
+; AVX:       ## %bb.0:
+; AVX-NEXT:    vsqrtss %xmm0, %xmm0, %xmm0
+; AVX-NEXT:    retq
+;
+; X86-LABEL: test_sqrt_f32:
+; X86:       # %bb.0:
+; X86-NEXT:    flds {{[0-9]+}}(%esp)
+; X86-NEXT:    fsqrt
+; X86-NEXT:    retl
+  %res = call float @llvm.sqrt.f32(float %a)
+  ret float %res
+}
+declare float @llvm.sqrt.f32(float) nounwind readnone
+
+define double @test_sqrt_f64(double %a) {
+; SSE2-LABEL: test_sqrt_f64:
+; SSE2:       ## %bb.0:
+; SSE2-NEXT:    sqrtsd %xmm0, %xmm0
+; SSE2-NEXT:    retq
+;
+; AVX-LABEL: test_sqrt_f64:
+; AVX:       ## %bb.0:
+; AVX-NEXT:    vsqrtsd %xmm0, %xmm0, %xmm0
+; AVX-NEXT:    retq
+;
+; X86-LABEL: test_sqrt_f64:
+; X86:       # %bb.0:
+; X86-NEXT:    fldl {{[0-9]+}}(%esp)
+; X86-NEXT:    fsqrt
+; X86-NEXT:    retl
+  %res = call double @llvm.sqrt.f64(double %a)
+  ret double %res
+}
+declare double @llvm.sqrt.f64(double) nounwind readnone
+
+define x86_fp80 @test_sqrt_f80(x86_fp80 %a) {
+; X64-LABEL: test_sqrt_f80:
+; X64:       ## %bb.0:
+; X64-NEXT:    fldt {{[0-9]+}}(%rsp)
+; X64-NEXT:    fsqrt
+; X64-NEXT:    retq
+;
+; X86-LABEL: test_sqrt_f80:
+; X86:       # %bb.0:
+; X86-NEXT:    fldt {{[0-9]+}}(%esp)
+; X86-NEXT:    fsqrt
+; X86-NEXT:    retl
+  %res = call x86_fp80 @llvm.sqrt.f80(x86_fp80 %a)
+  ret x86_fp80 %res
+}
+declare x86_fp80 @llvm.sqrt.f80(x86_fp80) nounwind readnone
+
+;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
+; FASTISEL-X86: {{.*}}
+; GISEL-X86: {{.*}}
+; SDAG-X86: {{.*}}